1555200113 has 2 divisors, whose sum is σ = 1555200114. Its totient is φ = 1555200112.

The previous prime is 1555200079. The next prime is 1555200161. The reversal of 1555200113 is 3110025551.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 821223649 + 733976464 = 28657^2 + 27092^2 .

It is a cyclic number.

It is not a de Polignac number, because 1555200113 - 2⁸ = 1555199857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1555200013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777600056 + 777600057.

It is an arithmetic number, because the mean of its divisors is an integer number (777600057).

Almost surely, 2^1555200113 is an apocalyptic number.

It is an amenable number.

1555200113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555200113 is an equidigital number, since it uses as much as digits as its factorization.

1555200113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1555200113 is about 39436.0255730721. The cubic root of 1555200113 is about 1158.5872895875.

Adding to 1555200113 its reverse (3110025551), we get a palindrome (4665225664).

The spelling of 1555200113 in words is "one billion, five hundred fifty-five million, two hundred thousand, one hundred thirteen".