1557236852 has 6 divisors (see below), whose sum is σ = 2725164498. Its totient is φ = 778618424.

The previous prime is 1557236851. The next prime is 1557236899. The reversal of 1557236852 is 2586327551.

It can be written as a sum of positive squares in only one way, i.e., 1518349156 + 38887696 = 38966^2 + 6236^2 .

It is a super-2 number, since 2×1557236852² = 4849973226453739808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557236851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194654603 + ... + 194654610.

It is an arithmetic number, because the mean of its divisors is an integer number (454194083).

Almost surely, 2^1557236852 is an apocalyptic number.

It is an amenable number.

1557236852 is a deficient number, since it is larger than the sum of its proper divisors (1167927646).

1557236852 is a wasteful number, since it uses less digits than its factorization.

1557236852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389309217 (or 389309215 counting only the distinct ones).

The product of its digits is 504000, while the sum is 44.

The square root of 1557236852 is about 39461.8404537852. The cubic root of 1557236852 is about 1159.0928430780.

The spelling of 1557236852 in words is "one billion, five hundred fifty-seven million, two hundred thirty-six thousand, eight hundred fifty-two".