2155133551 has 8 divisors (see below), whose sum is σ = 2161617408. Its totient is φ = 2148660000.

The previous prime is 2155133543. The next prime is 2155133567. The reversal of 2155133551 is 1553315512.

2155133551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2155133551 - 2³ = 2155133543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155133251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620961 + ... + 624421.

It is an arithmetic number, because the mean of its divisors is an integer number (270202176).

Almost surely, 2^2155133551 is an apocalyptic number.

2155133551 is a deficient number, since it is larger than the sum of its proper divisors (6483857).

2155133551 is a wasteful number, since it uses less digits than its factorization.

2155133551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5153.

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

The square root of 2155133551 is about 46423.4159772846. The cubic root of 2155133551 is about 1291.6893019652.

The spelling of 2155133551 in words is "two billion, one hundred fifty-five million, one hundred thirty-three thousand, five hundred fifty-one".