231312945 has 8 divisors (see below), whose sum is σ = 370100736. Its totient is φ = 123366896.

The previous prime is 231312943. The next prime is 231312997. The reversal of 231312945 is 549213132.

231312945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231312945 - 2¹ = 231312943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231312943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7710417 + ... + 7710446.

It is an arithmetic number, because the mean of its divisors is an integer number (46262592).

Almost surely, 2^231312945 is an apocalyptic number.

It is an amenable number.

231312945 is a deficient number, since it is larger than the sum of its proper divisors (138787791).

231312945 is a wasteful number, since it uses less digits than its factorization.

231312945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15420871.

The product of its digits is 6480, while the sum is 30.

The square root of 231312945 is about 15208.9758037811. The cubic root of 231312945 is about 613.8561991045.

The spelling of 231312945 in words is "two hundred thirty-one million, three hundred twelve thousand, nine hundred forty-five".