231144142 has 16 divisors (see below), whose sum is σ = 355958064. Its totient is φ = 112504000.

The previous prime is 231144131. The next prime is 231144157. The reversal of 231144142 is 241441132.

It is a happy number.

It is a super-2 number, since 2×231144142² = 106855228761832328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37392 + ... + 43132.

It is an arithmetic number, because the mean of its divisors is an integer number (22247379).

Almost surely, 2^231144142 is an apocalyptic number.

231144142 is a deficient number, since it is larger than the sum of its proper divisors (124813922).

231144142 is a wasteful number, since it uses less digits than its factorization.

231144142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6275.

The product of its digits is 768, while the sum is 22.

The square root of 231144142 is about 15203.4253377323. The cubic root of 231144142 is about 613.7068401422.

Adding to 231144142 its reverse (241441132), we get a palindrome (472585274).

The spelling of 231144142 in words is "two hundred thirty-one million, one hundred forty-four thousand, one hundred forty-two".