231390227 has 4 divisors (see below), whose sum is σ = 243568680. Its totient is φ = 219211776.

The previous prime is 231390223. The next prime is 231390241. The reversal of 231390227 is 722093132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231390227 - 2² = 231390223 is a prime.

It is a super-2 number, since 2×231390227² = 107082874302223058, 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 231390227.

It is not an unprimeable number, because it can be changed into a prime (231390223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6089198 + ... + 6089235.

It is an arithmetic number, because the mean of its divisors is an integer number (60892170).

Almost surely, 2^231390227 is an apocalyptic number.

231390227 is a deficient number, since it is larger than the sum of its proper divisors (12178453).

231390227 is a wasteful number, since it uses less digits than its factorization.

231390227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12178452.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 231390227 is about 15211.5162623586. The cubic root of 231390227 is about 613.9245549164.

The spelling of 231390227 in words is "two hundred thirty-one million, three hundred ninety thousand, two hundred twenty-seven".