15857157227 has 2 divisors, whose sum is σ = 15857157228. Its totient is φ = 15857157226.

The previous prime is 15857157137. The next prime is 15857157247. The reversal of 15857157227 is 72275175851.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15857157227 is a prime.

It is not a weakly prime, because it can be changed into another prime (15857157247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7928578613 + 7928578614.

It is an arithmetic number, because the mean of its divisors is an integer number (7928578614).

Almost surely, 2^15857157227 is an apocalyptic number.

15857157227 is a deficient number, since it is larger than the sum of its proper divisors (1).

15857157227 is an equidigital number, since it uses as much as digits as its factorization.

15857157227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1372000, while the sum is 50.

The spelling of 15857157227 in words is "fifteen billion, eight hundred fifty-seven million, one hundred fifty-seven thousand, two hundred twenty-seven".