231948644 has 12 divisors (see below), whose sum is σ = 415810668. Its totient is φ = 113145600.

The previous prime is 231948643. The next prime is 231948653. The reversal of 231948644 is 446849132.

It can be written as a sum of positive squares in 2 ways, for example, as 52388644 + 179560000 = 7238^2 + 13400^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (231948643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706997 + ... + 707324.

It is an arithmetic number, because the mean of its divisors is an integer number (34650889).

Almost surely, 2^231948644 is an apocalyptic number.

It is an amenable number.

231948644 is a deficient number, since it is larger than the sum of its proper divisors (183862024).

231948644 is a wasteful number, since it uses less digits than its factorization.

231948644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414366 (or 1414364 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 231948644 is about 15229.8602751306. The cubic root of 231948644 is about 614.4180221640.

The spelling of 231948644 in words is "two hundred thirty-one million, nine hundred forty-eight thousand, six hundred forty-four".