231318142 has 16 divisors (see below), whose sum is σ = 383854464. Its totient is φ = 103663000.

The previous prime is 231318091. The next prime is 231318149. The reversal of 231318142 is 241813132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231318149) 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, 72484 + ... + 75607.

It is an arithmetic number, because the mean of its divisors is an integer number (23990904).

Almost surely, 2^231318142 is an apocalyptic number.

231318142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231318142 is a deficient number, since it is larger than the sum of its proper divisors (152536322).

231318142 is a wasteful number, since it uses less digits than its factorization.

231318142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148175.

The product of its digits is 1152, while the sum is 25.

The square root of 231318142 is about 15209.1466558778. The cubic root of 231318142 is about 613.8607963206.

The spelling of 231318142 in words is "two hundred thirty-one million, three hundred eighteen thousand, one hundred forty-two".