231262261 has 2 divisors, whose sum is σ = 231262262. Its totient is φ = 231262260.

The previous prime is 231262249. The next prime is 231262277. The reversal of 231262261 is 162262132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229522500 + 1739761 = 15150^2 + 1319^2 .

It is a cyclic number.

It is not a de Polignac number, because 231262261 - 2⁷ = 231262133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231262061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115631130 + 115631131.

It is an arithmetic number, because the mean of its divisors is an integer number (115631131).

Almost surely, 2^231262261 is an apocalyptic number.

It is an amenable number.

231262261 is a deficient number, since it is larger than the sum of its proper divisors (1).

231262261 is an equidigital number, since it uses as much as digits as its factorization.

231262261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 231262261 is about 15207.3094595987. The cubic root of 231262261 is about 613.8113609160.

The spelling of 231262261 in words is "two hundred thirty-one million, two hundred sixty-two thousand, two hundred sixty-one".