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51373470 = 2357189271
BaseRepresentation
bin1100001111111…
…0010110011110
310120200001011010
43003332112132
5101122422340
65033040050
71162444611
oct303762636
9116601133
1051373470
1126aa9715
1215256026
13a849605
146b74178
15479bb80
hex30fe59e

51373470 has 64 divisors (see below), whose sum is σ = 126904320. Its totient is φ = 13305600.

The previous prime is 51373459. The next prime is 51373477. The reversal of 51373470 is 7437315.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51373477) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 189435 + ... + 189705.

It is an arithmetic number, because the mean of its divisors is an integer number (1982880).

Almost surely, 251373470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51373470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63452160).

51373470 is an abundant number, since it is smaller than the sum of its proper divisors (75530850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51373470 is a wasteful number, since it uses less digits than its factorization.

51373470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441.

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 51373470 is about 7167.5288628648. The cubic root of 51373470 is about 371.7459966823.

The spelling of 51373470 in words is "fifty-one million, three hundred seventy-three thousand, four hundred seventy".

Divisors: 1 2 3 5 6 10 15 30 71 89 142 178 213 267 271 355 426 445 534 542 710 813 890 1065 1335 1355 1626 2130 2670 2710 4065 6319 8130 12638 18957 19241 24119 31595 37914 38482 48238 57723 63190 72357 94785 96205 115446 120595 144714 189570 192410 241190 288615 361785 577230 723570 1712449 3424898 5137347 8562245 10274694 17124490 25686735 51373470