15431161157 has 2 divisors, whose sum is σ = 15431161158. Its totient is φ = 15431161156.

The previous prime is 15431161153. The next prime is 15431161199. The reversal of 15431161157 is 75116113451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13007174401 + 2423986756 = 114049^2 + 49234^2 .

It is an emirp because it is prime and its reverse (75116113451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15431161157 - 2² = 15431161153 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15431161153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7715580578 + 7715580579.

It is an arithmetic number, because the mean of its divisors is an integer number (7715580579).

Almost surely, 2^15431161157 is an apocalyptic number.

It is an amenable number.

15431161157 is a deficient number, since it is larger than the sum of its proper divisors (1).

15431161157 is an equidigital number, since it uses as much as digits as its factorization.

15431161157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 35.

The spelling of 15431161157 in words is "fifteen billion, four hundred thirty-one million, one hundred sixty-one thousand, one hundred fifty-seven".