51530804 has 36 divisors (see below), whose sum is σ = 100840320. Its totient is φ = 23006880.

The previous prime is 51530803. The next prime is 51530819. The reversal of 51530804 is 40803515.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51530803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19727 + ... + 22185.

It is an arithmetic number, because the mean of its divisors is an integer number (2801120).

Almost surely, 2^51530804 is an apocalyptic number.

It is an amenable number.

51530804 is a deficient number, since it is larger than the sum of its proper divisors (49309516).

51530804 is a wasteful number, since it uses less digits than its factorization.

51530804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520 (or 2505 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 51530804 is about 7178.4959427446. The cubic root of 51530804 is about 372.1251072634.

The spelling of 51530804 in words is "fifty-one million, five hundred thirty thousand, eight hundred four".