1553112553 has 4 divisors (see below), whose sum is σ = 1560473488. Its totient is φ = 1545751620.

The previous prime is 1553112529. The next prime is 1553112557. The reversal of 1553112553 is 3552113551.

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 an emirpimes, since its reverse is a distinct semiprime: 3552113551 = 7 ⋅507444793.

It is a cyclic number.

It is not a de Polignac number, because 1553112553 - 2¹⁷ = 1552981481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1553112557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3680151 + ... + 3680572.

It is an arithmetic number, because the mean of its divisors is an integer number (390118372).

Almost surely, 2^1553112553 is an apocalyptic number.

It is an amenable number.

1553112553 is a deficient number, since it is larger than the sum of its proper divisors (7360935).

1553112553 is an equidigital number, since it uses as much as digits as its factorization.

1553112553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7360934.

The product of its digits is 11250, while the sum is 31.

The square root of 1553112553 is about 39409.5490078230. The cubic root of 1553112553 is about 1158.0686631958.

The spelling of 1553112553 in words is "one billion, five hundred fifty-three million, one hundred twelve thousand, five hundred fifty-three".