2151566600 has 24 divisors (see below), whose sum is σ = 5002392810. Its totient is φ = 860626560.

The previous prime is 2151566581. The next prime is 2151566617. The reversal of 2151566600 is 66651512.

It can be written as a sum of positive squares in 3 ways, for example, as 1995766276 + 155800324 = 44674^2 + 12482^2 .

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, 5378717 + ... + 5379116.

Almost surely, 2^2151566600 is an apocalyptic number.

2151566600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151566600 is an abundant number, since it is smaller than the sum of its proper divisors (2850826210).

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

2151566600 is a wasteful number, since it uses less digits than its factorization.

2151566600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10757849 (or 10757840 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 2151566600 is about 46384.9824835582. The cubic root of 2151566600 is about 1290.9762855683.

The spelling of 2151566600 in words is "two billion, one hundred fifty-one million, five hundred sixty-six thousand, six hundred".