231224290 has 32 divisors (see below), whose sum is σ = 473786496. Its totient is φ = 80424960.

The previous prime is 231224261. The next prime is 231224291. The reversal of 231224290 is 92422132.

231224290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231224291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43167 + ... + 48226.

It is an arithmetic number, because the mean of its divisors is an integer number (14805828).

Almost surely, 2^231224290 is an apocalyptic number.

231224290 is an abundant number, since it is smaller than the sum of its proper divisors (242562206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231224290 is a wasteful number, since it uses less digits than its factorization.

231224290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91434.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 231224290 is about 15206.0609626556. The cubic root of 231224290 is about 613.7777651378. Note that the first 4 decimals are identical.

The spelling of 231224290 in words is "two hundred thirty-one million, two hundred twenty-four thousand, two hundred ninety".