15565061 has 2 divisors, whose sum is σ = 15565062. Its totient is φ = 15565060.

The previous prime is 15565031. The next prime is 15565079. The reversal of 15565061 is 16056551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10042561 + 5522500 = 3169^2 + 2350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15565061 is a prime.

It is a super-2 number, since 2×15565061² = 484542247867442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15565001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7782530 + 7782531.

It is an arithmetic number, because the mean of its divisors is an integer number (7782531).

Almost surely, 2^15565061 is an apocalyptic number.

It is an amenable number.

15565061 is a deficient number, since it is larger than the sum of its proper divisors (1).

15565061 is an equidigital number, since it uses as much as digits as its factorization.

15565061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 15565061 is about 3945.2580397231. The cubic root of 15565061 is about 249.6799156924.

The spelling of 15565061 in words is "fifteen million, five hundred sixty-five thousand, sixty-one".