231918955 has 8 divisors (see below), whose sum is σ = 278499312. Its totient is φ = 185404128.

The previous prime is 231918941. The next prime is 231918971. The reversal of 231918955 is 559819132.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231918955 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8224 + ... + 23053.

It is an arithmetic number, because the mean of its divisors is an integer number (34812414).

Almost surely, 2^231918955 is an apocalyptic number.

231918955 is a deficient number, since it is larger than the sum of its proper divisors (46580357).

231918955 is a wasteful number, since it uses less digits than its factorization.

231918955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32765.

The product of its digits is 97200, while the sum is 43.

The square root of 231918955 is about 15228.8855468810. The cubic root of 231918955 is about 614.3918062530.

The spelling of 231918955 in words is "two hundred thirty-one million, nine hundred eighteen thousand, nine hundred fifty-five".