231251142 has 16 divisors (see below), whose sum is σ = 464440320. Its totient is φ = 76760712.

The previous prime is 231251117. The next prime is 231251143. The reversal of 231251142 is 241152132.

231251142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231251143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79198 + ... + 82065.

It is an arithmetic number, because the mean of its divisors is an integer number (29027520).

Almost surely, 2^231251142 is an apocalyptic number.

231251142 is an abundant number, since it is smaller than the sum of its proper divisors (233189178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231251142 is a wasteful number, since it uses less digits than its factorization.

231251142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161507.

The product of its digits is 480, while the sum is 21.

The square root of 231251142 is about 15206.9438744279. The cubic root of 231251142 is about 613.8015234875.

The spelling of 231251142 in words is "two hundred thirty-one million, two hundred fifty-one thousand, one hundred forty-two".