51688152 has 32 divisors (see below), whose sum is σ = 143578800. Its totient is φ = 17229312.

The previous prime is 51688141. The next prime is 51688157. The reversal of 51688152 is 25188615.

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 (51688157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119433 + ... + 119864.

Almost surely, 2^51688152 is an apocalyptic number.

It is an amenable number.

51688152 is an abundant number, since it is smaller than the sum of its proper divisors (91890648).

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

51688152 is a wasteful number, since it uses less digits than its factorization.

51688152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239312 (or 239302 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 51688152 is about 7189.4472666541. The cubic root of 51688152 is about 372.5034805915.

The spelling of 51688152 in words is "fifty-one million, six hundred eighty-eight thousand, one hundred fifty-two".