2155383900 has 54 divisors (see below), whose sum is σ = 6755933912. Its totient is φ = 574768800.

The previous prime is 2155383863. The next prime is 2155383917. The reversal of 2155383900 is 93835512.

2155383900 is a `hidden beast` number, since 21 + 553 + 83 + 9 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1196536 + ... + 1198335.

Almost surely, 2^2155383900 is an apocalyptic number.

2155383900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155383900 is an abundant number, since it is smaller than the sum of its proper divisors (4600550012).

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

2155383900 is a wasteful number, since it uses less digits than its factorization.

2155383900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394891 (or 2394881 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 2155383900 is about 46426.1122645435. The cubic root of 2155383900 is about 1291.7393159739.

The spelling of 2155383900 in words is "two billion, one hundred fifty-five million, three hundred eighty-three thousand, nine hundred".