51515886 has 8 divisors (see below), whose sum is σ = 103031784. Its totient is φ = 17171960.

The previous prime is 51515869. The next prime is 51515923. The reversal of 51515886 is 68851515.

It is a sphenic number, since it is the product of 3 distinct primes.

51515886 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4292985 + ... + 4292996.

It is an arithmetic number, because the mean of its divisors is an integer number (12878973).

Almost surely, 2^51515886 is an apocalyptic number.

51515886 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51515886 is a wasteful number, since it uses less digits than its factorization.

51515886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8585986.

The product of its digits is 48000, while the sum is 39.

The square root of 51515886 is about 7177.4567919285. The cubic root of 51515886 is about 372.0891941285.

The spelling of 51515886 in words is "fifty-one million, five hundred fifteen thousand, eight hundred eighty-six".