231320238 has 32 divisors (see below), whose sum is σ = 472348800. Its totient is φ = 75499296.

The previous prime is 231320227. The next prime is 231320251. The reversal of 231320238 is 832023132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99028 + ... + 101336.

It is an arithmetic number, because the mean of its divisors is an integer number (14760900).

Almost surely, 2^231320238 is an apocalyptic number.

231320238 is an abundant number, since it is smaller than the sum of its proper divisors (241028562).

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

231320238 is a wasteful number, since it uses less digits than its factorization.

231320238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 231320238 is about 15209.2155616258. The cubic root of 231320238 is about 613.8626504025.

The spelling of 231320238 in words is "two hundred thirty-one million, three hundred twenty thousand, two hundred thirty-eight".