231534013254421 has 2 divisors, whose sum is σ = 231534013254422. Its totient is φ = 231534013254420.

The previous prime is 231534013254311. The next prime is 231534013254431. The reversal of 231534013254421 is 124452310435132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145476646276900 + 86057366977521 = 12061370^2 + 9276711^2 .

It is a cyclic number.

It is not a de Polignac number, because 231534013254421 - 2²¹ = 231534011157269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231534013254431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115767006627210 + 115767006627211.

It is an arithmetic number, because the mean of its divisors is an integer number (115767006627211).

Almost surely, 2^{231534013254421} is an apocalyptic number.

It is an amenable number.

231534013254421 is a deficient number, since it is larger than the sum of its proper divisors (1).

231534013254421 is an equidigital number, since it uses as much as digits as its factorization.

231534013254421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 231534013254421 its reverse (124452310435132), we get a palindrome (355986323689553).

The spelling of 231534013254421 in words is "two hundred thirty-one trillion, five hundred thirty-four billion, thirteen million, two hundred fifty-four thousand, four hundred twenty-one".