1557424543 has 2 divisors, whose sum is σ = 1557424544. Its totient is φ = 1557424542.

The previous prime is 1557424541. The next prime is 1557424567. The reversal of 1557424543 is 3454247551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1557424543 - 2¹ = 1557424541 is a prime.

Together with 1557424541, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1557424496 and 1557424505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1557424541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778712271 + 778712272.

It is an arithmetic number, because the mean of its divisors is an integer number (778712272).

Almost surely, 2^1557424543 is an apocalyptic number.

1557424543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1557424543 is an equidigital number, since it uses as much as digits as its factorization.

1557424543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336000, while the sum is 40.

The square root of 1557424543 is about 39464.2185150042. The cubic root of 1557424543 is about 1159.1394090098.

The spelling of 1557424543 in words is "one billion, five hundred fifty-seven million, four hundred twenty-four thousand, five hundred forty-three".