51681882 has 16 divisors (see below), whose sum is σ = 118130112. Its totient is φ = 14766240.

The previous prime is 51681871. The next prime is 51681893. The reversal of 51681882 is 28818615.

It is an interprime number because it is at equal distance from previous prime (51681871) and next prime (51681893).

It is a self number, because there is not a number n which added to its sum of digits gives 51681882.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615219 + ... + 615302.

It is an arithmetic number, because the mean of its divisors is an integer number (7383132).

Almost surely, 2^51681882 is an apocalyptic number.

51681882 is an abundant number, since it is smaller than the sum of its proper divisors (66448230).

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

51681882 is a wasteful number, since it uses less digits than its factorization.

51681882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230533.

The product of its digits is 30720, while the sum is 39.

The square root of 51681882 is about 7189.0111976544. The cubic root of 51681882 is about 372.4884178793.

The spelling of 51681882 in words is "fifty-one million, six hundred eighty-one thousand, eight hundred eighty-two".