1556235113 has 2 divisors, whose sum is σ = 1556235114. Its totient is φ = 1556235112.

The previous prime is 1556235101. The next prime is 1556235151. The reversal of 1556235113 is 3115326551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1123054144 + 433180969 = 33512^2 + 20813^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1556235113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1556235113.

It is not a weakly prime, because it can be changed into another prime (1556235173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778117556 + 778117557.

It is an arithmetic number, because the mean of its divisors is an integer number (778117557).

Almost surely, 2^1556235113 is an apocalyptic number.

It is an amenable number.

1556235113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1556235113 is an equidigital number, since it uses as much as digits as its factorization.

1556235113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 32.

The square root of 1556235113 is about 39449.1459096392. The cubic root of 1556235113 is about 1158.8442494305.

The spelling of 1556235113 in words is "one billion, five hundred fifty-six million, two hundred thirty-five thousand, one hundred thirteen".