15565227157 has 2 divisors, whose sum is σ = 15565227158. Its totient is φ = 15565227156.

The previous prime is 15565227137. The next prime is 15565227169. The reversal of 15565227157 is 75172256551.

15565227157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9826558641 + 5738668516 = 99129^2 + 75754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15565227157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15565227127) 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, 7782613578 + 7782613579.

It is an arithmetic number, because the mean of its divisors is an integer number (7782613579).

Almost surely, 2^15565227157 is an apocalyptic number.

It is an amenable number.

15565227157 is a deficient number, since it is larger than the sum of its proper divisors (1).

15565227157 is an equidigital number, since it uses as much as digits as its factorization.

15565227157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 735000, while the sum is 46.

The spelling of 15565227157 in words is "fifteen billion, five hundred sixty-five million, two hundred twenty-seven thousand, one hundred fifty-seven".