231643948 has 12 divisors (see below), whose sum is σ = 423002160. Its totient is φ = 110786192.

The previous prime is 231643933. The next prime is 231643957. The reversal of 231643948 is 849346132.

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 231643948.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1258843 + ... + 1259026.

It is an arithmetic number, because the mean of its divisors is an integer number (35250180).

Almost surely, 2^231643948 is an apocalyptic number.

It is an amenable number.

231643948 is a deficient number, since it is larger than the sum of its proper divisors (191358212).

231643948 is a wasteful number, since it uses less digits than its factorization.

231643948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517896 (or 2517894 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 231643948 is about 15219.8537443696. The cubic root of 231643948 is about 614.1488638051.

It can be divided in two parts, 2316 and 43948, that added together give a palindrome (46264).

The spelling of 231643948 in words is "two hundred thirty-one million, six hundred forty-three thousand, nine hundred forty-eight".