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23131038 = 2372292713
BaseRepresentation
bin101100000111…
…1001110011110
31121112011211010
41120033032132
521410143123
62143440050
7400416300
oct130171636
947464733
1023131038
1112069767
1278b6026
134a3b608
143101970
15206d993
hex160f39e

23131038 has 48 divisors (see below), whose sum is σ = 55691280. Its totient is φ = 6378624.

The previous prime is 23131027. The next prime is 23131057. The reversal of 23131038 is 83013132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7170 + ... + 9882.

It is an arithmetic number, because the mean of its divisors is an integer number (1160235).

Almost surely, 223131038 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23131038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27845640).

23131038 is an abundant number, since it is smaller than the sum of its proper divisors (32560242).

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

23131038 is a wasteful number, since it uses less digits than its factorization.

23131038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2761 (or 2754 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 23131038 is about 4809.4737757888. The cubic root of 23131038 is about 284.9257547444.

The spelling of 23131038 in words is "twenty-three million, one hundred thirty-one thousand, thirty-eight".

Divisors: 1 2 3 6 7 14 21 29 42 49 58 87 98 147 174 203 294 406 609 1218 1421 2713 2842 4263 5426 8139 8526 16278 18991 37982 56973 78677 113946 132937 157354 236031 265874 398811 472062 550739 797622 1101478 1652217 3304434 3855173 7710346 11565519 23131038