231220342113431 has 8 divisors (see below), whose sum is σ = 252295604356224. Its totient is φ = 210154285060920.

The previous prime is 231220342113421. The next prime is 231220342113437. The reversal of 231220342113431 is 134311243022132.

231220342113431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231220342113431 is a prime.

It is a super-2 number, since 2×231220342113431² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231220342113437) 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, 2301245045 + ... + 2301345518.

It is an arithmetic number, because the mean of its divisors is an integer number (31536950544528).

Almost surely, 2^{231220342113431} is an apocalyptic number.

231220342113431 is a deficient number, since it is larger than the sum of its proper divisors (21075262242793).

231220342113431 is a wasteful number, since it uses less digits than its factorization.

231220342113431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4602595141.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 231220342113431 its reverse (134311243022132), we get a palindrome (365531585135563).

The spelling of 231220342113431 in words is "two hundred thirty-one trillion, two hundred twenty billion, three hundred forty-two million, one hundred thirteen thousand, four hundred thirty-one".