42150520561 has 2 divisors, whose sum is σ = 42150520562. Its totient is φ = 42150520560.

The previous prime is 42150520499. The next prime is 42150520591. The reversal of 42150520561 is 16502505124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24973796961 + 17176723600 = 158031^2 + 131060^2 .

It is a cyclic number.

It is not a de Polignac number, because 42150520561 - 2²⁷ = 42016302833 is a prime.

It is not a weakly prime, because it can be changed into another prime (42150520591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21075260280 + 21075260281.

It is an arithmetic number, because the mean of its divisors is an integer number (21075260281).

Almost surely, 2^42150520561 is an apocalyptic number.

It is an amenable number.

42150520561 is a deficient number, since it is larger than the sum of its proper divisors (1).

42150520561 is an equidigital number, since it uses as much as digits as its factorization.

42150520561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 42150520561 in words is "forty-two billion, one hundred fifty million, five hundred twenty thousand, five hundred sixty-one".