15222152581 has 2 divisors, whose sum is σ = 15222152582. Its totient is φ = 15222152580.

The previous prime is 15222152551. The next prime is 15222152599. The reversal of 15222152581 is 18525122251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14744030625 + 478121956 = 121425^2 + 21866^2 .

It is a cyclic number.

It is not a de Polignac number, because 15222152581 - 2⁹ = 15222152069 is a prime.

It is a super-2 number, since 2×15222152581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15222152551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7611076290 + 7611076291.

It is an arithmetic number, because the mean of its divisors is an integer number (7611076291).

Almost surely, 2^15222152581 is an apocalyptic number.

It is an amenable number.

15222152581 is a deficient number, since it is larger than the sum of its proper divisors (1).

15222152581 is an equidigital number, since it uses as much as digits as its factorization.

15222152581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16000, while the sum is 34.

The spelling of 15222152581 in words is "fifteen billion, two hundred twenty-two million, one hundred fifty-two thousand, five hundred eighty-one".