15221400013 has 2 divisors, whose sum is σ = 15221400014. Its totient is φ = 15221400012.

The previous prime is 15221399981. The next prime is 15221400043. The reversal of 15221400013 is 31000412251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13920932169 + 1300467844 = 117987^2 + 36062^2 .

It is a cyclic number.

It is not a de Polignac number, because 15221400013 - 2⁵ = 15221399981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15221400043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7610700006 + 7610700007.

It is an arithmetic number, because the mean of its divisors is an integer number (7610700007).

Almost surely, 2^15221400013 is an apocalyptic number.

It is an amenable number.

15221400013 is a deficient number, since it is larger than the sum of its proper divisors (1).

15221400013 is an equidigital number, since it uses as much as digits as its factorization.

15221400013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 15221400013 its reverse (31000412251), we get a palindrome (46221812264).

The spelling of 15221400013 in words is "fifteen billion, two hundred twenty-one million, four hundred thousand, thirteen".