251164231 has 8 divisors (see below), whose sum is σ = 254629760. Its totient is φ = 247720032.

The previous prime is 251164219. The next prime is 251164253. The reversal of 251164231 is 132461152.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251164231 is a prime.

It is a super-2 number, since 2×251164231² = 126166941867642722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 251164196 and 251164205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251164261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19141 + ... + 29473.

It is an arithmetic number, because the mean of its divisors is an integer number (31828720).

Almost surely, 2^251164231 is an apocalyptic number.

251164231 is a deficient number, since it is larger than the sum of its proper divisors (3465529).

251164231 is a wasteful number, since it uses less digits than its factorization.

251164231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10665.

The product of its digits is 1440, while the sum is 25.

The square root of 251164231 is about 15848.1617546011. The cubic root of 251164231 is about 630.9369036344.

The spelling of 251164231 in words is "two hundred fifty-one million, one hundred sixty-four thousand, two hundred thirty-one".