231254018 has 6 divisors (see below), whose sum is σ = 346913289. Its totient is φ = 115616256.

The previous prime is 231254011. The next prime is 231254021. The reversal of 231254018 is 810452132.

It can be written as a sum of positive squares in 2 ways, for example, as 167365969 + 63888049 = 12937^2 + 7993^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=10753.

It is a super-2 number, since 2×231254018² = 106956841682288648, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231254011) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16130 + ... + 26882.

Almost surely, 2^231254018 is an apocalyptic number.

231254018 is a deficient number, since it is larger than the sum of its proper divisors (115659271).

231254018 is an frugal number, since it uses more digits than its factorization.

231254018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21508 (or 10755 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 231254018 is about 15207.0384361979. The cubic root of 231254018 is about 613.8040680311.

The spelling of 231254018 in words is "two hundred thirty-one million, two hundred fifty-four thousand, eighteen".