2155205300 has 18 divisors (see below), whose sum is σ = 4676795718. Its totient is φ = 862082080.

The previous prime is 2155205291. The next prime is 2155205323. The reversal of 2155205300 is 35025512.

It can be written as a sum of positive squares in 3 ways, for example, as 156400036 + 1998805264 = 12506^2 + 44708^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10775927 + ... + 10776126.

Almost surely, 2^2155205300 is an apocalyptic number.

2155205300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155205300 is an abundant number, since it is smaller than the sum of its proper divisors (2521590418).

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

2155205300 is a wasteful number, since it uses less digits than its factorization.

2155205300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21552067 (or 21552060 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 2155205300 is about 46424.1887381998. The cubic root of 2155205300 is about 1291.7036361716.

The spelling of 2155205300 in words is "two billion, one hundred fifty-five million, two hundred five thousand, three hundred".