1557100343 has 4 divisors (see below), whose sum is σ = 1559208120. Its totient is φ = 1554992568.

The previous prime is 1557100327. The next prime is 1557100403. The reversal of 1557100343 is 3430017551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1557100343 - 2⁴ = 1557100327 is a prime.

It is a super-2 number, since 2×1557100343² = 4849122956341435298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557102343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052780 + ... + 1054257.

It is an arithmetic number, because the mean of its divisors is an integer number (389802030).

Almost surely, 2^1557100343 is an apocalyptic number.

1557100343 is a deficient number, since it is larger than the sum of its proper divisors (2107777).

1557100343 is an equidigital number, since it uses as much as digits as its factorization.

1557100343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107776.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 1557100343 is about 39460.1107829160. The cubic root of 1557100343 is about 1159.0589729941.

Adding to 1557100343 its reverse (3430017551), we get a palindrome (4987117894).

The spelling of 1557100343 in words is "one billion, five hundred fifty-seven million, one hundred thousand, three hundred forty-three".