23031265513 has 2 divisors, whose sum is σ = 23031265514. Its totient is φ = 23031265512.

The previous prime is 23031265493. The next prime is 23031265529. The reversal of 23031265513 is 31556213032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17436674304 + 5594591209 = 132048^2 + 74797^2 .

It is a cyclic number.

It is not a de Polignac number, because 23031265513 - 2⁹ = 23031265001 is a prime.

It is a super-2 number, since 2×23031265513² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23031265573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11515632756 + 11515632757.

It is an arithmetic number, because the mean of its divisors is an integer number (11515632757).

Almost surely, 2^23031265513 is an apocalyptic number.

It is an amenable number.

23031265513 is a deficient number, since it is larger than the sum of its proper divisors (1).

23031265513 is an equidigital number, since it uses as much as digits as its factorization.

23031265513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 31.

Adding to 23031265513 its reverse (31556213032), we get a palindrome (54587478545).

The spelling of 23031265513 in words is "twenty-three billion, thirty-one million, two hundred sixty-five thousand, five hundred thirteen".