231540183 has 12 divisors (see below), whose sum is σ = 382225168. Its totient is φ = 132308640.

The previous prime is 231540181. The next prime is 231540193. The reversal of 231540183 is 381045132.

It is a happy number.

It is not a de Polignac number, because 231540183 - 2¹ = 231540181 is a prime.

It is a super-2 number, since 2×231540183² = 107221712687346978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231540181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1837558 + ... + 1837683.

Almost surely, 2^231540183 is an apocalyptic number.

231540183 is a deficient number, since it is larger than the sum of its proper divisors (150684985).

231540183 is a wasteful number, since it uses less digits than its factorization.

231540183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3675254 (or 3675251 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 231540183 is about 15216.4444927191. Note that the first 4 decimals coincide. The cubic root of 231540183 is about 614.0571473651.

The spelling of 231540183 in words is "two hundred thirty-one million, five hundred forty thousand, one hundred eighty-three".