231852478 has 32 divisors (see below), whose sum is σ = 430093440. Its totient is φ = 92158560.

The previous prime is 231852461. The next prime is 231852479. The reversal of 231852478 is 874258132.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 231852478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231852479) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15900 + ... + 26767.

It is an arithmetic number, because the mean of its divisors is an integer number (13440420).

Almost surely, 2^231852478 is an apocalyptic number.

231852478 is a deficient number, since it is larger than the sum of its proper divisors (198240962).

231852478 is a wasteful number, since it uses less digits than its factorization.

231852478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42712.

The product of its digits is 107520, while the sum is 40.

The square root of 231852478 is about 15226.7027947616. The cubic root of 231852478 is about 614.3330977743. Note that the first 3 decimals are identical.

The spelling of 231852478 in words is "two hundred thirty-one million, eight hundred fifty-two thousand, four hundred seventy-eight".