51031617 has 32 divisors (see below), whose sum is σ = 84575232. Its totient is φ = 26650944.

The previous prime is 51031597. The next prime is 51031649. The reversal of 51031617 is 71613015.

It is not a de Polignac number, because 51031617 - 2⁶ = 51031553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51031667) 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 31 ways as a sum of consecutive naturals, for example, 28338 + ... + 30084.

It is an arithmetic number, because the mean of its divisors is an integer number (2642976).

Almost surely, 2^51031617 is an apocalyptic number.

It is an amenable number.

51031617 is a deficient number, since it is larger than the sum of its proper divisors (33543615).

51031617 is a wasteful number, since it uses less digits than its factorization.

51031617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 51031617 is about 7143.6417183395. The cubic root of 51031617 is about 370.9195947064.

The spelling of 51031617 in words is "fifty-one million, thirty-one thousand, six hundred seventeen".