1557338097 has 32 divisors (see below), whose sum is σ = 2500971520. Its totient is φ = 842063040.

The previous prime is 1557338093. The next prime is 1557338129. The reversal of 1557338097 is 7908337551.

It is not a de Polignac number, because 1557338097 - 2² = 1557338093 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1557338093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 434322 + ... + 437892.

It is an arithmetic number, because the mean of its divisors is an integer number (78155360).

Almost surely, 2^1557338097 is an apocalyptic number.

It is an amenable number.

1557338097 is a deficient number, since it is larger than the sum of its proper divisors (943633423).

1557338097 is a wasteful number, since it uses less digits than its factorization.

1557338097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4693.

The product of its (nonzero) digits is 793800, while the sum is 48.

The square root of 1557338097 is about 39463.1232545018. The cubic root of 1557338097 is about 1159.1179623165.

The spelling of 1557338097 in words is "one billion, five hundred fifty-seven million, three hundred thirty-eight thousand, ninety-seven".