231320090 has 32 divisors (see below), whose sum is σ = 428302080. Its totient is φ = 89911744.

The previous prime is 231320077. The next prime is 231320099. The reversal of 231320090 is 90023132.

231320090 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 (231320099) 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, 54671 + ... + 58749.

It is an arithmetic number, because the mean of its divisors is an integer number (13384440).

Almost surely, 2^231320090 is an apocalyptic number.

231320090 is a deficient number, since it is larger than the sum of its proper divisors (196981990).

231320090 is a wasteful number, since it uses less digits than its factorization.

231320090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4246.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 231320090 is about 15209.2106961538. The cubic root of 231320090 is about 613.8625194849.

The spelling of 231320090 in words is "two hundred thirty-one million, three hundred twenty thousand, ninety".