231553424251571 has 2 divisors, whose sum is σ = 231553424251572. Its totient is φ = 231553424251570.

The previous prime is 231553424251451. The next prime is 231553424251649. The reversal of 231553424251571 is 175152424355132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231553424251571 is a prime.

It is not a weakly prime, because it can be changed into another prime (231553724251571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115776712125785 + 115776712125786.

It is an arithmetic number, because the mean of its divisors is an integer number (115776712125786).

Almost surely, 2^{231553424251571} is an apocalyptic number.

231553424251571 is a deficient number, since it is larger than the sum of its proper divisors (1).

231553424251571 is an equidigital number, since it uses as much as digits as its factorization.

231553424251571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040000, while the sum is 50.

The spelling of 231553424251571 in words is "two hundred thirty-one trillion, five hundred fifty-three billion, four hundred twenty-four million, two hundred fifty-one thousand, five hundred seventy-one".