51631942 has 16 divisors (see below), whose sum is σ = 78862320. Its totient is φ = 25347168.

The previous prime is 51631901. The next prime is 51631961. The reversal of 51631942 is 24913615.

It is a congruent number.

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, 67828 + ... + 68584.

It is an arithmetic number, because the mean of its divisors is an integer number (4928895).

Almost surely, 2^51631942 is an apocalyptic number.

51631942 is a deficient number, since it is larger than the sum of its proper divisors (27230378).

51631942 is a wasteful number, since it uses less digits than its factorization.

51631942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335.

The product of its digits is 6480, while the sum is 31.

The square root of 51631942 is about 7185.5370015052. The cubic root of 51631942 is about 372.3684011811.

The spelling of 51631942 in words is "fifty-one million, six hundred thirty-one thousand, nine hundred forty-two".