51031264 has 24 divisors (see below), whose sum is σ = 105756840. Its totient is φ = 24172416.

The previous prime is 51031261. The next prime is 51031291. The reversal of 51031264 is 46213015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51031261) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 41359 + ... + 42574.

It is an arithmetic number, because the mean of its divisors is an integer number (4406535).

Almost surely, 2^51031264 is an apocalyptic number.

It is an amenable number.

51031264 is an abundant number, since it is smaller than the sum of its proper divisors (54725576).

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

51031264 is a wasteful number, since it uses less digits than its factorization.

51031264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83962 (or 83954 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 51031264 is about 7143.6170110106. The cubic root of 51031264 is about 370.9187394529.

Adding to 51031264 its reverse (46213015), we get a palindrome (97244279).

The spelling of 51031264 in words is "fifty-one million, thirty-one thousand, two hundred sixty-four".