2154991132 has 24 divisors (see below), whose sum is σ = 4351832576. Its totient is φ = 914599728.

The previous prime is 2154991123. The next prime is 2154991193. The reversal of 2154991132 is 2311994512.

It is a junction number, because it is equal to n+sod(n) for n = 2154991091 and 2154991100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370728 + ... + 376495.

Almost surely, 2^2154991132 is an apocalyptic number.

It is an amenable number.

2154991132 is an abundant number, since it is smaller than the sum of its proper divisors (2196841444).

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

2154991132 is a wasteful number, since it uses less digits than its factorization.

2154991132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747337 (or 747335 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 2154991132 is about 46421.8820385387. The cubic root of 2154991132 is about 1291.6608481754.

The spelling of 2154991132 in words is "two billion, one hundred fifty-four million, nine hundred ninety-one thousand, one hundred thirty-two".