51311136 has 24 divisors (see below), whose sum is σ = 134691984. Its totient is φ = 17103680.

The previous prime is 51311129. The next prime is 51311167. The reversal of 51311136 is 63111315.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×51311136² = 5265665355220992, 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 in 3 ways as a sum of consecutive naturals, for example, 267150 + ... + 267341.

It is an arithmetic number, because the mean of its divisors is an integer number (5612166).

Almost surely, 2^51311136 is an apocalyptic number.

It is an amenable number.

51311136 is an abundant number, since it is smaller than the sum of its proper divisors (83380848).

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

51311136 is a wasteful number, since it uses less digits than its factorization.

51311136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534504 (or 534496 counting only the distinct ones).

The product of its digits is 270, while the sum is 21.

The square root of 51311136 is about 7163.1791824580. The cubic root of 51311136 is about 371.5955831624.

The spelling of 51311136 in words is "fifty-one million, three hundred eleven thousand, one hundred thirty-six".