51157632 has 64 divisors (see below), whose sum is σ = 137088000. Its totient is φ = 16902144.

The previous prime is 51157621. The next prime is 51157669. The reversal of 51157632 is 23675115.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 51157632.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48244 + ... + 49292.

It is an arithmetic number, because the mean of its divisors is an integer number (2142000).

Almost surely, 2^51157632 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 51157632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68544000).

51157632 is an abundant number, since it is smaller than the sum of its proper divisors (85930368).

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

51157632 is a wasteful number, since it uses less digits than its factorization.

51157632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193 (or 1181 counting only the distinct ones).

The product of its digits is 6300, while the sum is 30.

The square root of 51157632 is about 7152.4563612790. The cubic root of 51157632 is about 371.2246540304.

The spelling of 51157632 in words is "fifty-one million, one hundred fifty-seven thousand, six hundred thirty-two".