15015350221 has 2 divisors, whose sum is σ = 15015350222. Its totient is φ = 15015350220.

The previous prime is 15015350183. The next prime is 15015350257. The reversal of 15015350221 is 12205351051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13002840900 + 2012509321 = 114030^2 + 44861^2 .

It is a cyclic number.

It is not a de Polignac number, because 15015350221 - 2⁷ = 15015350093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15015350281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7507675110 + 7507675111.

It is an arithmetic number, because the mean of its divisors is an integer number (7507675111).

Almost surely, 2^15015350221 is an apocalyptic number.

It is an amenable number.

15015350221 is a deficient number, since it is larger than the sum of its proper divisors (1).

15015350221 is an equidigital number, since it uses as much as digits as its factorization.

15015350221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 25.

The spelling of 15015350221 in words is "fifteen billion, fifteen million, three hundred fifty thousand, two hundred twenty-one".