51151668 has 12 divisors (see below), whose sum is σ = 119353920. Its totient is φ = 17050552.

The previous prime is 51151613. The next prime is 51151687. The reversal of 51151668 is 86615115.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2131308 + ... + 2131331.

It is an arithmetic number, because the mean of its divisors is an integer number (9946160).

Almost surely, 2^51151668 is an apocalyptic number.

It is an amenable number.

51151668 is an abundant number, since it is smaller than the sum of its proper divisors (68202252).

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

51151668 is a wasteful number, since it uses less digits than its factorization.

51151668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262646 (or 4262644 counting only the distinct ones).

The product of its digits is 7200, while the sum is 33.

The square root of 51151668 is about 7152.0394294215. The cubic root of 51151668 is about 371.2102275750.

The spelling of 51151668 in words is "fifty-one million, one hundred fifty-one thousand, six hundred sixty-eight".