51274866 has 32 divisors (see below), whose sum is σ = 107360640. Its totient is φ = 16294784.

The previous prime is 51274849. The next prime is 51274921. The reversal of 51274866 is 66847215.

It is a super-2 number, since 2×51274866² = 5258223766635912, which contains 22 as substring.

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, 78196 + ... + 78848.

It is an arithmetic number, because the mean of its divisors is an integer number (3355020).

Almost surely, 2^51274866 is an apocalyptic number.

51274866 is an abundant number, since it is smaller than the sum of its proper divisors (56085774).

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

51274866 is a wasteful number, since it uses less digits than its factorization.

51274866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250.

The product of its digits is 80640, while the sum is 39.

The square root of 51274866 is about 7160.6470378032. The cubic root of 51274866 is about 371.5080066650.

The spelling of 51274866 in words is "fifty-one million, two hundred seventy-four thousand, eight hundred sixty-six".