23531534129 has 2 divisors, whose sum is σ = 23531534130. Its totient is φ = 23531534128.

The previous prime is 23531534123. The next prime is 23531534141. The reversal of 23531534129 is 92143513532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23341728400 + 189805729 = 152780^2 + 13777^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23531534129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23531534092 and 23531534101.

It is not a weakly prime, because it can be changed into another prime (23531534123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11765767064 + 11765767065.

It is an arithmetic number, because the mean of its divisors is an integer number (11765767065).

Almost surely, 2^23531534129 is an apocalyptic number.

It is an amenable number.

23531534129 is a deficient number, since it is larger than the sum of its proper divisors (1).

23531534129 is an equidigital number, since it uses as much as digits as its factorization.

23531534129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 38.

The spelling of 23531534129 in words is "twenty-three billion, five hundred thirty-one million, five hundred thirty-four thousand, one hundred twenty-nine".