331298420561 has 2 divisors, whose sum is σ = 331298420562. Its totient is φ = 331298420560.

The previous prime is 331298420501. The next prime is 331298420567. The reversal of 331298420561 is 165024892133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250119014161 + 81179406400 = 500119^2 + 284920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331298420561 is a prime.

It is not a weakly prime, because it can be changed into another prime (331298420567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165649210280 + 165649210281.

It is an arithmetic number, because the mean of its divisors is an integer number (165649210281).

Almost surely, 2^331298420561 is an apocalyptic number.

It is an amenable number.

331298420561 is a deficient number, since it is larger than the sum of its proper divisors (1).

331298420561 is an equidigital number, since it uses as much as digits as its factorization.

331298420561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 331298420561 in words is "three hundred thirty-one billion, two hundred ninety-eight million, four hundred twenty thousand, five hundred sixty-one".