51330231 has 12 divisors (see below), whose sum is σ = 75188880. Its totient is φ = 33737760.

The previous prime is 51330199. The next prime is 51330247. The reversal of 51330231 is 13203315.

It is not a de Polignac number, because 51330231 - 2⁵ = 51330199 is a prime.

It is a super-2 number, since 2×51330231² = 5269585229026722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51330031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39526 + ... + 40803.

It is an arithmetic number, because the mean of its divisors is an integer number (6265740).

Almost surely, 2^51330231 is an apocalyptic number.

51330231 is a deficient number, since it is larger than the sum of its proper divisors (23858649).

51330231 is a wasteful number, since it uses less digits than its factorization.

51330231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80406 (or 80403 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 51330231 is about 7164.5119163834. The cubic root of 51330231 is about 371.6416728173.

Adding to 51330231 its reverse (13203315), we get a palindrome (64533546).

The spelling of 51330231 in words is "fifty-one million, three hundred thirty thousand, two hundred thirty-one".