2155622600 has 24 divisors (see below), whose sum is σ = 5011823010. Its totient is φ = 862248960.

The previous prime is 2155622533. The next prime is 2155622633. The reversal of 2155622600 is 62265512.

It can be written as a sum of positive squares in 3 ways, for example, as 1191768484 + 963854116 = 34522^2 + 31046^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5388857 + ... + 5389256.

Almost surely, 2^2155622600 is an apocalyptic number.

2155622600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155622600 is an abundant number, since it is smaller than the sum of its proper divisors (2856200410).

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

2155622600 is a wasteful number, since it uses less digits than its factorization.

2155622600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10778129 (or 10778120 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2155622600 is about 46428.6829449210. The cubic root of 2155622600 is about 1291.7869991721.

The spelling of 2155622600 in words is "two billion, one hundred fifty-five million, six hundred twenty-two thousand, six hundred".