51612918 has 32 divisors (see below), whose sum is σ = 124913664. Its totient is φ = 13878912.

The previous prime is 51612907. The next prime is 51612929. The reversal of 51612918 is 81921615.

It is an interprime number because it is at equal distance from previous prime (51612907) and next prime (51612929).

It is a congruent number.

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, 35430 + ... + 36857.

It is an arithmetic number, because the mean of its divisors is an integer number (3903552).

Almost surely, 2^51612918 is an apocalyptic number.

51612918 is an abundant number, since it is smaller than the sum of its proper divisors (73300746).

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

51612918 is a wasteful number, since it uses less digits than its factorization.

51612918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72316.

The product of its digits is 4320, while the sum is 33.

The square root of 51612918 is about 7184.2131093113. The cubic root of 51612918 is about 372.3226620100.

The spelling of 51612918 in words is "fifty-one million, six hundred twelve thousand, nine hundred eighteen".