332261561 has 2 divisors, whose sum is σ = 332261562. Its totient is φ = 332261560.

The previous prime is 332261557. The next prime is 332261563. The reversal of 332261561 is 165162233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312405625 + 19855936 = 17675^2 + 4456^2 .

It is an emirp because it is prime and its reverse (165162233) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 332261561 - 2² = 332261557 is a prime.

It is a super-2 number, since 2×332261561² = 220795489836313442, which contains 22 as substring.

Together with 332261563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (332261563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166130780 + 166130781.

It is an arithmetic number, because the mean of its divisors is an integer number (166130781).

Almost surely, 2^332261561 is an apocalyptic number.

It is an amenable number.

332261561 is a deficient number, since it is larger than the sum of its proper divisors (1).

332261561 is an equidigital number, since it uses as much as digits as its factorization.

332261561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 29.

The square root of 332261561 is about 18228.0432575743. The cubic root of 332261561 is about 692.6173510327.

The spelling of 332261561 in words is "three hundred thirty-two million, two hundred sixty-one thousand, five hundred sixty-one".