231788374 has 4 divisors (see below), whose sum is σ = 347682564. Its totient is φ = 115894186.

The previous prime is 231788357. The next prime is 231788399. The reversal of 231788374 is 473887132.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 231788374.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57947092 + ... + 57947095.

It is an arithmetic number, because the mean of its divisors is an integer number (86920641).

Almost surely, 2^231788374 is an apocalyptic number.

231788374 is a deficient number, since it is larger than the sum of its proper divisors (115894190).

231788374 is a wasteful number, since it uses less digits than its factorization.

231788374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115894189.

The product of its digits is 225792, while the sum is 43.

The square root of 231788374 is about 15224.5976629926. The cubic root of 231788374 is about 614.2764743569.

The spelling of 231788374 in words is "two hundred thirty-one million, seven hundred eighty-eight thousand, three hundred seventy-four".