1557542030 has 64 divisors (see below), whose sum is σ = 3148238016. Its totient is φ = 549888000.

The previous prime is 1557542017. The next prime is 1557542039. The reversal of 1557542030 is 302457551.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557542039) 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, 1086194 + ... + 1087626.

It is an arithmetic number, because the mean of its divisors is an integer number (49191219).

Almost surely, 2^1557542030 is an apocalyptic number.

1557542030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1557542030 is an abundant number, since it is smaller than the sum of its proper divisors (1590695986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1557542030 is a wasteful number, since it uses less digits than its factorization.

1557542030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 1557542030 is about 39465.7070125444. The cubic root of 1557542030 is about 1159.1685555021.

Adding to 1557542030 its reverse (302457551), we get a palindrome (1859999581).

The spelling of 1557542030 in words is "one billion, five hundred fifty-seven million, five hundred forty-two thousand, thirty".