51145968 has 40 divisors (see below), whose sum is σ = 132433488. Its totient is φ = 17009152.

The previous prime is 51145957. The next prime is 51145987. The reversal of 51145968 is 86954115.

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, 25780 + ... + 27692.

Almost surely, 2^51145968 is an apocalyptic number.

It is an amenable number.

51145968 is an abundant number, since it is smaller than the sum of its proper divisors (81287520).

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

51145968 is a wasteful number, since it uses less digits than its factorization.

51145968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481 (or 2475 counting only the distinct ones).

The product of its digits is 43200, while the sum is 39.

The square root of 51145968 is about 7151.6409305837. The cubic root of 51145968 is about 371.1964386673.

The spelling of 51145968 in words is "fifty-one million, one hundred forty-five thousand, nine hundred sixty-eight".