331325432261 has 2 divisors, whose sum is σ = 331325432262. Its totient is φ = 331325432260.

The previous prime is 331325432203. The next prime is 331325432297. The reversal of 331325432261 is 162234523133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 330631900036 + 693532225 = 575006^2 + 26335^2 .

It is an emirp because it is prime and its reverse (162234523133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331325432261 - 2³⁸ = 56447525317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331325432861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165662716130 + 165662716131.

It is an arithmetic number, because the mean of its divisors is an integer number (165662716131).

Almost surely, 2^331325432261 is an apocalyptic number.

It is an amenable number.

331325432261 is a deficient number, since it is larger than the sum of its proper divisors (1).

331325432261 is an equidigital number, since it uses as much as digits as its factorization.

331325432261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 35.

Adding to 331325432261 its reverse (162234523133), we get a palindrome (493559955394).

The spelling of 331325432261 in words is "three hundred thirty-one billion, three hundred twenty-five million, four hundred thirty-two thousand, two hundred sixty-one".