51075504 has 90 divisors (see below), whose sum is σ = 147206228. Its totient is φ = 16531200.

The previous prime is 51075499. The next prime is 51075509. The reversal of 51075504 is 40557015.

51075504 is a `hidden beast` number, since 5 + 107 + 550 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (51075499) and next prime (51075509).

It is not an unprimeable number, because it can be changed into a prime (51075509) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 241959 + ... + 242169.

Almost surely, 2^51075504 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 51075504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73603114).

51075504 is an abundant number, since it is smaller than the sum of its proper divisors (96130724).

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

51075504 is a wasteful number, since it uses less digits than its factorization.

51075504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 51075504 is about 7146.7128107963. The cubic root of 51075504 is about 371.0258940619.

The spelling of 51075504 in words is "fifty-one million, seventy-five thousand, five hundred four".