15500222131 has 2 divisors, whose sum is σ = 15500222132. Its totient is φ = 15500222130.

The previous prime is 15500222117. The next prime is 15500222147. The reversal of 15500222131 is 13122200551.

It is a weak prime.

It is an emirp because it is prime and its reverse (13122200551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15500222131 - 2¹⁷ = 15500091059 is a prime.

It is a super-2 number, since 2×15500222131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15500222191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7750111065 + 7750111066.

It is an arithmetic number, because the mean of its divisors is an integer number (7750111066).

Almost surely, 2^15500222131 is an apocalyptic number.

15500222131 is a deficient number, since it is larger than the sum of its proper divisors (1).

15500222131 is an equidigital number, since it uses as much as digits as its factorization.

15500222131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 15500222131 its reverse (13122200551), we get a palindrome (28622422682).

The spelling of 15500222131 in words is "fifteen billion, five hundred million, two hundred twenty-two thousand, one hundred thirty-one".