231531454043 has 2 divisors, whose sum is σ = 231531454044. Its totient is φ = 231531454042.

The previous prime is 231531454013. The next prime is 231531454051. The reversal of 231531454043 is 340454135132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231531454043 - 2⁸ = 231531453787 is a prime.

It is a super-2 number, since 2×231531454043² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231531453994 and 231531454012.

It is not a weakly prime, because it can be changed into another prime (231531454013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115765727021 + 115765727022.

It is an arithmetic number, because the mean of its divisors is an integer number (115765727022).

Almost surely, 2^231531454043 is an apocalyptic number.

231531454043 is a deficient number, since it is larger than the sum of its proper divisors (1).

231531454043 is an equidigital number, since it uses as much as digits as its factorization.

231531454043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 231531454043 its reverse (340454135132), we get a palindrome (571985589175).

The spelling of 231531454043 in words is "two hundred thirty-one billion, five hundred thirty-one million, four hundred fifty-four thousand, forty-three".