51107972 has 6 divisors (see below), whose sum is σ = 89438958. Its totient is φ = 25553984.

The previous prime is 51107963. The next prime is 51107981. The reversal of 51107972 is 27970115.

It is an interprime number because it is at equal distance from previous prime (51107963) and next prime (51107981).

It can be written as a sum of positive squares in only one way, i.e., 25867396 + 25240576 = 5086^2 + 5024^2 .

It is a super-2 number, since 2×51107972² = 5224049603905568, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 6388493 + ... + 6388500.

It is an arithmetic number, because the mean of its divisors is an integer number (14906493).

Almost surely, 2^51107972 is an apocalyptic number.

It is an amenable number.

51107972 is a deficient number, since it is larger than the sum of its proper divisors (38330986).

51107972 is a wasteful number, since it uses less digits than its factorization.

51107972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12776997 (or 12776995 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 51107972 is about 7148.9839837560. The cubic root of 51107972 is about 371.1044961059.

The spelling of 51107972 in words is "fifty-one million, one hundred seven thousand, nine hundred seventy-two".