2155155132 has 96 divisors (see below), whose sum is σ = 5653985344. Its totient is φ = 634521600.

The previous prime is 2155155091. The next prime is 2155155133. The reversal of 2155155132 is 2315515512.

It is a self number, because there is not a number n which added to its sum of digits gives 2155155132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155155133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349032 + ... + 355152.

Almost surely, 2^2155155132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155155132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2826992672).

2155155132 is an abundant number, since it is smaller than the sum of its proper divisors (3498830212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155155132 is a wasteful number, since it uses less digits than its factorization.

2155155132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6239 (or 6237 counting only the distinct ones).

The product of its digits is 7500, while the sum is 30.

The square root of 2155155132 is about 46423.6484132818. The cubic root of 2155155132 is about 1291.6936135084.

The spelling of 2155155132 in words is "two billion, one hundred fifty-five million, one hundred fifty-five thousand, one hundred thirty-two".