231122539 has 2 divisors, whose sum is σ = 231122540. Its totient is φ = 231122538.

The previous prime is 231122533. The next prime is 231122603. The reversal of 231122539 is 935221132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231122539 - 2⁹ = 231122027 is a prime.

It is not a weakly prime, because it can be changed into another prime (231122533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115561269 + 115561270.

It is an arithmetic number, because the mean of its divisors is an integer number (115561270).

Almost surely, 2^231122539 is an apocalyptic number.

231122539 is a deficient number, since it is larger than the sum of its proper divisors (1).

231122539 is an equidigital number, since it uses as much as digits as its factorization.

231122539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 231122539 is about 15202.7148562354. The cubic root of 231122539 is about 613.6877202951.

It can be divided in two parts, 23112 and 2539, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 231122539 in words is "two hundred thirty-one million, one hundred twenty-two thousand, five hundred thirty-nine".