231037613 has 2 divisors, whose sum is σ = 231037614. Its totient is φ = 231037612.

The previous prime is 231037579. The next prime is 231037619. The reversal of 231037613 is 316730132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230948809 + 88804 = 15197^2 + 298^2 .

It is a cyclic number.

It is not a de Polignac number, because 231037613 - 2¹⁸ = 230775469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231037619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115518806 + 115518807.

It is an arithmetic number, because the mean of its divisors is an integer number (115518807).

Almost surely, 2^231037613 is an apocalyptic number.

It is an amenable number.

231037613 is a deficient number, since it is larger than the sum of its proper divisors (1).

231037613 is an equidigital number, since it uses as much as digits as its factorization.

231037613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 231037613 is about 15199.9214800603. The cubic root of 231037613 is about 613.6125445486.

Adding to 231037613 its reverse (316730132), we get a palindrome (547767745).

The spelling of 231037613 in words is "two hundred thirty-one million, thirty-seven thousand, six hundred thirteen".