1555241113 has 4 divisors (see below), whose sum is σ = 1555355520. Its totient is φ = 1555126708.

The previous prime is 1555241099. The next prime is 1555241119. The reversal of 1555241113 is 3111425551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3111425551 = 13 ⋅239340427.

It is a cyclic number.

It is not a de Polignac number, because 1555241113 - 2⁵ = 1555241081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1555241119) 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, 33553 + ... + 65086.

It is an arithmetic number, because the mean of its divisors is an integer number (388838880).

Almost surely, 2^1555241113 is an apocalyptic number.

It is an amenable number.

1555241113 is a deficient number, since it is larger than the sum of its proper divisors (114407).

1555241113 is an equidigital number, since it uses as much as digits as its factorization.

1555241113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114406.

The product of its digits is 3000, while the sum is 28.

The square root of 1555241113 is about 39436.5453989063. The cubic root of 1555241113 is about 1158.5974708414.

Adding to 1555241113 its reverse (3111425551), we get a palindrome (4666666664).

It can be divided in two parts, 15552 and 41113, that added together give a palindrome (56665).

The spelling of 1555241113 in words is "one billion, five hundred fifty-five million, two hundred forty-one thousand, one hundred thirteen".