51087402 has 32 divisors (see below), whose sum is σ = 115948800. Its totient is φ = 16665984.

The previous prime is 51087391. The next prime is 51087427. The reversal of 51087402 is 20478015.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7527 + ... + 12602.

It is an arithmetic number, because the mean of its divisors is an integer number (3623400).

Almost surely, 2^51087402 is an apocalyptic number.

51087402 is an abundant number, since it is smaller than the sum of its proper divisors (64861398).

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

51087402 is a wasteful number, since it uses less digits than its factorization.

51087402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20187 (or 20181 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 51087402 is about 7147.5451729947. The cubic root of 51087402 is about 371.0547018921.

The spelling of 51087402 in words is "fifty-one million, eighty-seven thousand, four hundred two".