231242420131 has 4 divisors (see below), whose sum is σ = 231248666392. Its totient is φ = 231236173872.

The previous prime is 231242420113. The next prime is 231242420147. The reversal of 231242420131 is 131024242132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231242420131 - 2¹¹ = 231242418083 is a prime.

It is a super-3 number, since 3×231242420131³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231242420096 and 231242420105.

It is not an unprimeable number, because it can be changed into a prime (231242420111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3067266 + ... + 3141751.

It is an arithmetic number, because the mean of its divisors is an integer number (57812166598).

Almost surely, 2^231242420131 is an apocalyptic number.

231242420131 is a deficient number, since it is larger than the sum of its proper divisors (6246261).

231242420131 is an equidigital number, since it uses as much as digits as its factorization.

231242420131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6246260.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 231242420131 its reverse (131024242132), we get a palindrome (362266662263).

The spelling of 231242420131 in words is "two hundred thirty-one billion, two hundred forty-two million, four hundred twenty thousand, one hundred thirty-one".