231403208 has 16 divisors (see below), whose sum is σ = 437722380. Its totient is φ = 114677248.

The previous prime is 231403187. The next prime is 231403213. The reversal of 231403208 is 802304132.

It can be written as a sum of positive squares in 2 ways, for example, as 139665124 + 91738084 = 11818^2 + 9578^2 .

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, 127085 + ... + 128892.

Almost surely, 2^231403208 is an apocalyptic number.

It is an amenable number.

231403208 is a deficient number, since it is larger than the sum of its proper divisors (206319172).

231403208 is a wasteful number, since it uses less digits than its factorization.

231403208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256096 (or 256092 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 231403208 is about 15211.9429396774. The cubic root of 231403208 is about 613.9360350983.

The spelling of 231403208 in words is "two hundred thirty-one million, four hundred three thousand, two hundred eight".