1553213553 has 8 divisors (see below), whose sum is σ = 2137756416. Its totient is φ = 1002073200.

The previous prime is 1553213531. The next prime is 1553213569. The reversal of 1553213553 is 3553123551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1553213553 - 2⁸ = 1553213297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1553213573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8350518 + ... + 8350703.

It is an arithmetic number, because the mean of its divisors is an integer number (267219552).

Almost surely, 2^1553213553 is an apocalyptic number.

It is an amenable number.

1553213553 is a deficient number, since it is larger than the sum of its proper divisors (584542863).

1553213553 is a wasteful number, since it uses less digits than its factorization.

1553213553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16701255.

The product of its digits is 33750, while the sum is 33.

The square root of 1553213553 is about 39410.8304023145. The cubic root of 1553213553 is about 1158.0937659911.

The spelling of 1553213553 in words is "one billion, five hundred fifty-three million, two hundred thirteen thousand, five hundred fifty-three".