51545688 has 16 divisors (see below), whose sum is σ = 128864280. Its totient is φ = 17181888.

The previous prime is 51545687. The next prime is 51545693. The reversal of 51545688 is 88654515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51545687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1073845 + ... + 1073892.

Almost surely, 2^51545688 is an apocalyptic number.

It is an amenable number.

51545688 is an abundant number, since it is smaller than the sum of its proper divisors (77318592).

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

51545688 is a wasteful number, since it uses less digits than its factorization.

51545688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147746 (or 2147742 counting only the distinct ones).

The product of its digits is 192000, while the sum is 42.

The square root of 51545688 is about 7179.5325753144. The cubic root of 51545688 is about 372.1609316408.

The spelling of 51545688 in words is "fifty-one million, five hundred forty-five thousand, six hundred eighty-eight".