231660345 has 32 divisors (see below), whose sum is σ = 424673280. Its totient is φ = 105635520.

The previous prime is 231660329. The next prime is 231660361. The reversal of 231660345 is 543066132.

It is an interprime number because it is at equal distance from previous prime (231660329) and next prime (231660361).

It is not a de Polignac number, because 231660345 - 2⁴ = 231660329 is a prime.

It is a zygodrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42696 + ... + 47814.

It is an arithmetic number, because the mean of its divisors is an integer number (13271040).

Almost surely, 2^231660345 is an apocalyptic number.

It is an amenable number.

231660345 is a deficient number, since it is larger than the sum of its proper divisors (193012935).

231660345 is a wasteful number, since it uses less digits than its factorization.

231660345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 231660345 is about 15220.3924062424. The cubic root of 231660345 is about 614.1633543791.

The spelling of 231660345 in words is "two hundred thirty-one million, six hundred sixty thousand, three hundred forty-five".