15130445221 has 2 divisors, whose sum is σ = 15130445222. Its totient is φ = 15130445220.

The previous prime is 15130445191. The next prime is 15130445227. The reversal of 15130445221 is 12254403151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9699492196 + 5430953025 = 98486^2 + 73695^2 .

It is a cyclic number.

It is not a de Polignac number, because 15130445221 - 2⁷ = 15130445093 is a prime.

It is a super-3 number, since 3×15130445221³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15130445221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15130445227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7565222610 + 7565222611.

It is an arithmetic number, because the mean of its divisors is an integer number (7565222611).

Almost surely, 2^15130445221 is an apocalyptic number.

It is an amenable number.

15130445221 is a deficient number, since it is larger than the sum of its proper divisors (1).

15130445221 is an equidigital number, since it uses as much as digits as its factorization.

15130445221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 15130445221 its reverse (12254403151), we get a palindrome (27384848372).

The spelling of 15130445221 in words is "fifteen billion, one hundred thirty million, four hundred forty-five thousand, two hundred twenty-one".