51856264 has 8 divisors (see below), whose sum is σ = 97230510. Its totient is φ = 25928128.

The previous prime is 51856261. The next prime is 51856271. The reversal of 51856264 is 46265815.

It can be written as a sum of positive squares in only one way, i.e., 50552100 + 1304164 = 7110^2 + 1142^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (51856261) 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 as a sum of consecutive naturals, namely, 3241009 + ... + 3241024.

Almost surely, 2^51856264 is an apocalyptic number.

It is an amenable number.

51856264 is a deficient number, since it is larger than the sum of its proper divisors (45374246).

51856264 is a wasteful number, since it uses less digits than its factorization.

51856264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6482039 (or 6482035 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 51856264 is about 7201.1293558719. The cubic root of 51856264 is about 372.9068904872.

It can be divided in two parts, 5185 and 6264, that added together give a square (11449 = 107²).

The spelling of 51856264 in words is "fifty-one million, eight hundred fifty-six thousand, two hundred sixty-four".