15055089221 has 2 divisors, whose sum is σ = 15055089222. Its totient is φ = 15055089220.

The previous prime is 15055089173. The next prime is 15055089229. The reversal of 15055089221 is 12298055051.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14324738596 + 730350625 = 119686^2 + 27025^2 .

It is a cyclic number.

It is not a de Polignac number, because 15055089221 - 2³⁰ = 13981347397 is a prime.

It is a super-2 number, since 2×15055089221² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15055089229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7527544610 + 7527544611.

It is an arithmetic number, because the mean of its divisors is an integer number (7527544611).

Almost surely, 2^15055089221 is an apocalyptic number.

It is an amenable number.

15055089221 is a deficient number, since it is larger than the sum of its proper divisors (1).

15055089221 is an equidigital number, since it uses as much as digits as its factorization.

15055089221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 38.

The spelling of 15055089221 in words is "fifteen billion, fifty-five million, eighty-nine thousand, two hundred twenty-one".