150565561 has 2 divisors, whose sum is σ = 150565562. Its totient is φ = 150565560.

The previous prime is 150565537. The next prime is 150565577. The reversal of 150565561 is 165565051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106090000 + 44475561 = 10300^2 + 6669^2 .

It is an emirp because it is prime and its reverse (165565051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 150565561 - 2⁵ = 150565529 is a prime.

It is not a weakly prime, because it can be changed into another prime (150565501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75282780 + 75282781.

It is an arithmetic number, because the mean of its divisors is an integer number (75282781).

Almost surely, 2^150565561 is an apocalyptic number.

It is an amenable number.

150565561 is a deficient number, since it is larger than the sum of its proper divisors (1).

150565561 is an equidigital number, since it uses as much as digits as its factorization.

150565561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 150565561 is about 12270.5159223237. The cubic root of 150565561 is about 531.9962229083.

The spelling of 150565561 in words is "one hundred fifty million, five hundred sixty-five thousand, five hundred sixty-one".