231526013 has 2 divisors, whose sum is σ = 231526014. Its totient is φ = 231526012.

The previous prime is 231526007. The next prime is 231526019. The reversal of 231526013 is 310625132.

It is a balanced prime because it is at equal distance from previous prime (231526007) and next prime (231526019).

It can be written as a sum of positive squares in only one way, i.e., 183819364 + 47706649 = 13558^2 + 6907^2 .

It is a cyclic number.

It is not a de Polignac number, because 231526013 - 2²⁰ = 230477437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231526013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231526019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115763006 + 115763007.

It is an arithmetic number, because the mean of its divisors is an integer number (115763007).

Almost surely, 2^231526013 is an apocalyptic number.

It is an amenable number.

231526013 is a deficient number, since it is larger than the sum of its proper divisors (1).

231526013 is an equidigital number, since it uses as much as digits as its factorization.

231526013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 231526013 is about 15215.9788709107. The cubic root of 231526013 is about 614.0446205729.

The spelling of 231526013 in words is "two hundred thirty-one million, five hundred twenty-six thousand, thirteen".