1557245133 has 6 divisors (see below), whose sum is σ = 2249354094. Its totient is φ = 1038163416.

The previous prime is 1557245093. The next prime is 1557245143. The reversal of 1557245133 is 3315427551.

1557245133 is a `hidden beast` number, since 1 + 5 + 572 + 4 + 51 + 33 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1286083044 + 271162089 = 35862^2 + 16467^2 .

It is not a de Polignac number, because 1557245133 - 2⁶ = 1557245069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557245143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86513610 + ... + 86513627.

It is an arithmetic number, because the mean of its divisors is an integer number (374892349).

Almost surely, 2^1557245133 is an apocalyptic number.

It is an amenable number.

1557245133 is a deficient number, since it is larger than the sum of its proper divisors (692108961).

1557245133 is a wasteful number, since it uses less digits than its factorization.

1557245133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173027243 (or 173027240 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 1557245133 is about 39461.9453777940. The cubic root of 1557245133 is about 1159.0948976640.

The spelling of 1557245133 in words is "one billion, five hundred fifty-seven million, two hundred forty-five thousand, one hundred thirty-three".