1557226043 has 16 divisors (see below), whose sum is σ = 1634411520. Its totient is φ = 1482120000.

The previous prime is 1557225991. The next prime is 1557226051. The reversal of 1557226043 is 3406227551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1557226043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1557225994 and 1557226012.

It is not an unprimeable number, because it can be changed into a prime (1557226093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 690668 + ... + 692918.

It is an arithmetic number, because the mean of its divisors is an integer number (102150720).

Almost surely, 2^1557226043 is an apocalyptic number.

1557226043 is a deficient number, since it is larger than the sum of its proper divisors (77185477).

1557226043 is a wasteful number, since it uses less digits than its factorization.

1557226043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 1557226043 is about 39461.7034984553. The cubic root of 1557226043 is about 1159.0901612630.

The spelling of 1557226043 in words is "one billion, five hundred fifty-seven million, two hundred twenty-six thousand, forty-three".