51918552 has 96 divisors (see below), whose sum is σ = 165934080. Its totient is φ = 14351040.

The previous prime is 51918551. The next prime is 51918589. The reversal of 51918552 is 25581915.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51918551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13963 + ... + 17285.

It is an arithmetic number, because the mean of its divisors is an integer number (1728480).

Almost surely, 2^51918552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51918552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82967040).

51918552 is an abundant number, since it is smaller than the sum of its proper divisors (114015528).

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

51918552 is a wasteful number, since it uses less digits than its factorization.

51918552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373 (or 3366 counting only the distinct ones).

The product of its digits is 18000, while the sum is 36.

The square root of 51918552 is about 7205.4529351041. The cubic root of 51918552 is about 373.0561384836.

The spelling of 51918552 in words is "fifty-one million, nine hundred eighteen thousand, five hundred fifty-two".