2155120553 has 8 divisors (see below), whose sum is σ = 2219395200. Its totient is φ = 2091770928.

The previous prime is 2155120507. The next prime is 2155120571. The reversal of 2155120553 is 3550215512.

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

It is a cyclic number.

It is not a de Polignac number, because 2155120553 - 2²² = 2150926249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155120573) 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, 226526 + ... + 235847.

It is an arithmetic number, because the mean of its divisors is an integer number (277424400).

Almost surely, 2^2155120553 is an apocalyptic number.

It is an amenable number.

2155120553 is a deficient number, since it is larger than the sum of its proper divisors (64274647).

2155120553 is an equidigital number, since it uses as much as digits as its factorization.

2155120553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462511.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 2155120553 is about 46423.2759830669. The cubic root of 2155120553 is about 1291.6867051561.

The spelling of 2155120553 in words is "two billion, one hundred fifty-five million, one hundred twenty thousand, five hundred fifty-three".