15722255137 has 2 divisors, whose sum is σ = 15722255138. Its totient is φ = 15722255136.

The previous prime is 15722255057. The next prime is 15722255161. The reversal of 15722255137 is 73155222751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9699098256 + 6023156881 = 98484^2 + 77609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15722255137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15722255137.

It is not a weakly prime, because it can be changed into another prime (15722255167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7861127568 + 7861127569.

It is an arithmetic number, because the mean of its divisors is an integer number (7861127569).

Almost surely, 2^15722255137 is an apocalyptic number.

It is an amenable number.

15722255137 is a deficient number, since it is larger than the sum of its proper divisors (1).

15722255137 is an equidigital number, since it uses as much as digits as its factorization.

15722255137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147000, while the sum is 40.

Adding to 15722255137 its reverse (73155222751), we get a palindrome (88877477888).

The spelling of 15722255137 in words is "fifteen billion, seven hundred twenty-two million, two hundred fifty-five thousand, one hundred thirty-seven".