51864672 has 48 divisors (see below), whose sum is σ = 139475952. Its totient is φ = 16865280.

The previous prime is 51864667. The next prime is 51864677. The reversal of 51864672 is 27646815.

It is an interprime number because it is at equal distance from previous prime (51864667) and next prime (51864677).

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 51864672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51864677) 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 7 ways as a sum of consecutive naturals, for example, 2653 + ... + 10524.

It is an arithmetic number, because the mean of its divisors is an integer number (2905749).

Almost surely, 2^51864672 is an apocalyptic number.

It is an amenable number.

51864672 is an abundant number, since it is smaller than the sum of its proper divisors (87611280).

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

51864672 is a wasteful number, since it uses less digits than its factorization.

51864672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13231 (or 13223 counting only the distinct ones).

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

The square root of 51864672 is about 7201.7131295269. The cubic root of 51864672 is about 372.9270438332.

The spelling of 51864672 in words is "fifty-one million, eight hundred sixty-four thousand, six hundred seventy-two".