231213542 has 16 divisors (see below), whose sum is σ = 396644352. Its totient is φ = 99021960.

The previous prime is 231213497. The next prime is 231213551. The reversal of 231213542 is 245312132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18317 + ... + 28247.

It is an arithmetic number, because the mean of its divisors is an integer number (24790272).

Almost surely, 2^231213542 is an apocalyptic number.

231213542 is a deficient number, since it is larger than the sum of its proper divisors (165430810).

231213542 is a wasteful number, since it uses less digits than its factorization.

231213542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11603.

The product of its digits is 1440, while the sum is 23.

The square root of 231213542 is about 15205.7075468391. The cubic root of 231213542 is about 613.7682549120.

Adding to 231213542 its reverse (245312132), we get a palindrome (476525674).

The spelling of 231213542 in words is "two hundred thirty-one million, two hundred thirteen thousand, five hundred forty-two".