51230491 has 6 divisors (see below), whose sum is σ = 55474620. Its totient is φ = 47289528.

The previous prime is 51230483. The next prime is 51230497. The reversal of 51230491 is 19403215.

It is not a de Polignac number, because 51230491 - 2³ = 51230483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51230497) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151401 + ... + 151738.

It is an arithmetic number, because the mean of its divisors is an integer number (9245770).

Almost surely, 2^51230491 is an apocalyptic number.

51230491 is a deficient number, since it is larger than the sum of its proper divisors (4244129).

51230491 is a wasteful number, since it uses less digits than its factorization.

51230491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303165 (or 303152 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 51230491 is about 7157.5478342796. The cubic root of 51230491 is about 371.4008038766.

The spelling of 51230491 in words is "fifty-one million, two hundred thirty thousand, four hundred ninety-one".