231144424081 has 2 divisors, whose sum is σ = 231144424082. Its totient is φ = 231144424080.

The previous prime is 231144423997. The next prime is 231144424103. The reversal of 231144424081 is 180424441132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214661715856 + 16482708225 = 463316^2 + 128385^2 .

It is a cyclic number.

It is not a de Polignac number, because 231144424081 - 2¹³ = 231144415889 is a prime.

It is a super-2 number, since 2×231144424081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231144425081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115572212040 + 115572212041.

It is an arithmetic number, because the mean of its divisors is an integer number (115572212041).

Almost surely, 2^231144424081 is an apocalyptic number.

It is an amenable number.

231144424081 is a deficient number, since it is larger than the sum of its proper divisors (1).

231144424081 is an equidigital number, since it uses as much as digits as its factorization.

231144424081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 34.

The spelling of 231144424081 in words is "two hundred thirty-one billion, one hundred forty-four million, four hundred twenty-four thousand, eighty-one".