51396904 has 32 divisors (see below), whose sum is σ = 108299520. Its totient is φ = 22689216.

The previous prime is 51396901. The next prime is 51396907. The reversal of 51396904 is 40969315.

It is an interprime number because it is at equal distance from previous prime (51396901) and next prime (51396907).

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (51396901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8352 + ... + 13135.

It is an arithmetic number, because the mean of its divisors is an integer number (3384360).

Almost surely, 2^51396904 is an apocalyptic number.

It is an amenable number.

51396904 is an abundant number, since it is smaller than the sum of its proper divisors (56902616).

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

51396904 is a wasteful number, since it uses less digits than its factorization.

51396904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21529 (or 21525 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 51396904 is about 7169.1634100500. The cubic root of 51396904 is about 371.8025120487.

The spelling of 51396904 in words is "fifty-one million, three hundred ninety-six thousand, nine hundred four".