231424021240381 has 2 divisors, whose sum is σ = 231424021240382. Its totient is φ = 231424021240380.

The previous prime is 231424021240361. The next prime is 231424021240483. The reversal of 231424021240381 is 183042120424132.

231424021240381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187305665353156 + 44118355887225 = 13685966^2 + 6642165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231424021240381 is a prime.

It is a super-2 number, since 2×231424021240381² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231424021240381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231424021240331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115712010620190 + 115712010620191.

It is an arithmetic number, because the mean of its divisors is an integer number (115712010620191).

Almost surely, 2^{231424021240381} is an apocalyptic number.

It is an amenable number.

231424021240381 is a deficient number, since it is larger than the sum of its proper divisors (1).

231424021240381 is an equidigital number, since it uses as much as digits as its factorization.

231424021240381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728, while the sum is 37.

The spelling of 231424021240381 in words is "two hundred thirty-one trillion, four hundred twenty-four billion, twenty-one million, two hundred forty thousand, three hundred eighty-one".