15857157103 has 2 divisors, whose sum is σ = 15857157104. Its totient is φ = 15857157102.

The previous prime is 15857157061. The next prime is 15857157137. The reversal of 15857157103 is 30175175851.

It is a strong prime.

It is an emirp because it is prime and its reverse (30175175851) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15857157103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15857157103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15857157403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7928578551 + 7928578552.

It is an arithmetic number, because the mean of its divisors is an integer number (7928578552).

Almost surely, 2^15857157103 is an apocalyptic number.

15857157103 is a deficient number, since it is larger than the sum of its proper divisors (1).

15857157103 is an equidigital number, since it uses as much as digits as its factorization.

15857157103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147000, while the sum is 43.

The spelling of 15857157103 in words is "fifteen billion, eight hundred fifty-seven million, one hundred fifty-seven thousand, one hundred three".