1557196051 has 2 divisors, whose sum is σ = 1557196052. Its totient is φ = 1557196050.

The previous prime is 1557196037. The next prime is 1557196099. The reversal of 1557196051 is 1506917551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1557196051 - 2⁵ = 1557196019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1557195995 and 1557196013.

It is not a weakly prime, because it can be changed into another prime (1557190051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778598025 + 778598026.

It is an arithmetic number, because the mean of its divisors is an integer number (778598026).

Almost surely, 2^1557196051 is an apocalyptic number.

1557196051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1557196051 is an equidigital number, since it uses as much as digits as its factorization.

1557196051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47250, while the sum is 40.

The square root of 1557196051 is about 39461.3234826203. The cubic root of 1557196051 is about 1159.0827198995.

The spelling of 1557196051 in words is "one billion, five hundred fifty-seven million, one hundred ninety-six thousand, fifty-one".