231320355 has 64 divisors (see below), whose sum is σ = 435207168. Its totient is φ = 102735360.

The previous prime is 231320351. The next prime is 231320371. The reversal of 231320355 is 553023132.

It is a happy number.

It is not a de Polignac number, because 231320355 - 2² = 231320351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231320351) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1096200 + ... + 1096410.

It is an arithmetic number, because the mean of its divisors is an integer number (6800112).

Almost surely, 2^231320355 is an apocalyptic number.

231320355 is a deficient number, since it is larger than the sum of its proper divisors (203886813).

231320355 is a wasteful number, since it uses less digits than its factorization.

231320355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 231320355 is about 15209.2194079775. The cubic root of 231320355 is about 613.8627538982.

Adding to 231320355 its reverse (553023132), we get a palindrome (784343487).

The spelling of 231320355 in words is "two hundred thirty-one million, three hundred twenty thousand, three hundred fifty-five".