51172032 has 28 divisors (see below), whose sum is σ = 135393176. Its totient is φ = 17057280.

The previous prime is 51172019. The next prime is 51172061. The reversal of 51172032 is 23027115.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133069 + ... + 133452.

Almost surely, 2^51172032 is an apocalyptic number.

It is an amenable number.

51172032 is an abundant number, since it is smaller than the sum of its proper divisors (84221144).

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

51172032 is a wasteful number, since it uses less digits than its factorization.

51172032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266536 (or 266526 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 51172032 is about 7153.4629376268. The cubic root of 51172032 is about 371.2594818968.

Adding to 51172032 its reverse (23027115), we get a palindrome (74199147).

The spelling of 51172032 in words is "fifty-one million, one hundred seventy-two thousand, thirty-two".