51555828 has 12 divisors (see below), whose sum is σ = 120296960. Its totient is φ = 17185272.

The previous prime is 51555827. The next prime is 51555863. The reversal of 51555828 is 82855515.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555827) 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, 2148148 + ... + 2148171.

Almost surely, 2^51555828 is an apocalyptic number.

It is an amenable number.

51555828 is an abundant number, since it is smaller than the sum of its proper divisors (68741132).

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

51555828 is a wasteful number, since it uses less digits than its factorization.

51555828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4296326 (or 4296324 counting only the distinct ones).

The product of its digits is 80000, while the sum is 39.

The square root of 51555828 is about 7180.2387146947. The cubic root of 51555828 is about 372.1853337106.

The spelling of 51555828 in words is "fifty-one million, five hundred fifty-five thousand, eight hundred twenty-eight".