15106131281 has 2 divisors, whose sum is σ = 15106131282. Its totient is φ = 15106131280.

The previous prime is 15106131263. The next prime is 15106131289. The reversal of 15106131281 is 18213160151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11540130625 + 3566000656 = 107425^2 + 59716^2 .

It is a cyclic number.

It is not a de Polignac number, because 15106131281 - 2¹⁰ = 15106130257 is a prime.

It is a super-2 number, since 2×15106131281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15106131289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7553065640 + 7553065641.

It is an arithmetic number, because the mean of its divisors is an integer number (7553065641).

Almost surely, 2^15106131281 is an apocalyptic number.

It is an amenable number.

15106131281 is a deficient number, since it is larger than the sum of its proper divisors (1).

15106131281 is an equidigital number, since it uses as much as digits as its factorization.

15106131281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 29.

The spelling of 15106131281 in words is "fifteen billion, one hundred six million, one hundred thirty-one thousand, two hundred eighty-one".