51540931 has 8 divisors (see below), whose sum is σ = 55649664. Its totient is φ = 47452800.

The previous prime is 51540911. The next prime is 51540947. The reversal of 51540931 is 13904515.

51540931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51540931 - 2⁷ = 51540803 is a prime.

It is a super-2 number, since 2×51540931² = 5312935136693522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51540931.

It is not an unprimeable number, because it can be changed into a prime (51540911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270 + ... + 10156.

It is an arithmetic number, because the mean of its divisors is an integer number (6956208).

Almost surely, 2^51540931 is an apocalyptic number.

51540931 is a deficient number, since it is larger than the sum of its proper divisors (4108733).

51540931 is a wasteful number, since it uses less digits than its factorization.

51540931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10301.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 51540931 is about 7179.2012786939. The cubic root of 51540931 is about 372.1494827426.

The spelling of 51540931 in words is "fifty-one million, five hundred forty thousand, nine hundred thirty-one".