15222997129 has 2 divisors, whose sum is σ = 15222997130. Its totient is φ = 15222997128.

The previous prime is 15222997121. The next prime is 15222997151. The reversal of 15222997129 is 92179922251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7809787129 + 7413210000 = 88373^2 + 86100^2 .

It is a cyclic number.

It is not a de Polignac number, because 15222997129 - 2³ = 15222997121 is a prime.

It is not a weakly prime, because it can be changed into another prime (15222997121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7611498564 + 7611498565.

It is an arithmetic number, because the mean of its divisors is an integer number (7611498565).

Almost surely, 2^15222997129 is an apocalyptic number.

It is an amenable number.

15222997129 is a deficient number, since it is larger than the sum of its proper divisors (1).

15222997129 is an equidigital number, since it uses as much as digits as its factorization.

15222997129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 49.

The spelling of 15222997129 in words is "fifteen billion, two hundred twenty-two million, nine hundred ninety-seven thousand, one hundred twenty-nine".