231752416891 has 2 divisors, whose sum is σ = 231752416892. Its totient is φ = 231752416890.

The previous prime is 231752416877. The next prime is 231752416901. The reversal of 231752416891 is 198614257132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231752416891 - 2²³ = 231744028283 is a prime.

It is not a weakly prime, because it can be changed into another prime (231752416801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115876208445 + 115876208446.

It is an arithmetic number, because the mean of its divisors is an integer number (115876208446).

Almost surely, 2^231752416891 is an apocalyptic number.

231752416891 is a deficient number, since it is larger than the sum of its proper divisors (1).

231752416891 is an equidigital number, since it uses as much as digits as its factorization.

231752416891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 49.

The spelling of 231752416891 in words is "two hundred thirty-one billion, seven hundred fifty-two million, four hundred sixteen thousand, eight hundred ninety-one".