231189142 has 4 divisors (see below), whose sum is σ = 346783716. Its totient is φ = 115594570.

The previous prime is 231189139. The next prime is 231189151. The reversal of 231189142 is 241981132.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57797284 + ... + 57797287.

It is an arithmetic number, because the mean of its divisors is an integer number (86695929).

Almost surely, 2^231189142 is an apocalyptic number.

231189142 is a deficient number, since it is larger than the sum of its proper divisors (115594574).

231189142 is a wasteful number, since it uses less digits than its factorization.

231189142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115594573.

The product of its digits is 3456, while the sum is 31.

The square root of 231189142 is about 15204.9051953638. The cubic root of 231189142 is about 613.7466638002.

The spelling of 231189142 in words is "two hundred thirty-one million, one hundred eighty-nine thousand, one hundred forty-two".