2155043600 has 60 divisors (see below), whose sum is σ = 5275232676. Its totient is φ = 845744640.

The previous prime is 2155043549. The next prime is 2155043603. The reversal of 2155043600 is 63405512.

It can be written as a sum of positive squares in 6 ways, for example, as 179774464 + 1975269136 = 13408^2 + 44444^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2155043600.

It is not an unprimeable number, because it can be changed into a prime (2155043603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29627 + ... + 72026.

Almost surely, 2^2155043600 is an apocalyptic number.

2155043600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155043600 is an abundant number, since it is smaller than the sum of its proper divisors (3120189076).

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

2155043600 is a wasteful number, since it uses less digits than its factorization.

2155043600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101724 (or 101713 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 2155043600 is about 46422.4471565212. The cubic root of 2155043600 is about 1291.6713308653.

The spelling of 2155043600 in words is "two billion, one hundred fifty-five million, forty-three thousand, six hundred".