51630466 has 24 divisors (see below), whose sum is σ = 80789940. Its totient is φ = 24743232.

The previous prime is 51630451. The next prime is 51630473. The reversal of 51630466 is 66403615.

It can be written as a sum of positive squares in 6 ways, for example, as 51624225 + 6241 = 7185^2 + 79^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 298356 + ... + 298528.

Almost surely, 2^51630466 is an apocalyptic number.

51630466 is a deficient number, since it is larger than the sum of its proper divisors (29159474).

51630466 is a wasteful number, since it uses less digits than its factorization.

51630466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 51630466 is about 7185.4342944599. The cubic root of 51630466 is about 372.3648528543.

The spelling of 51630466 in words is "fifty-one million, six hundred thirty thousand, four hundred sixty-six".