2151204500 has 24 divisors (see below), whose sum is σ = 4698231720. Its totient is φ = 860481600.

The previous prime is 2151204499. The next prime is 2151204521. The reversal of 2151204500 is 54021512.

It can be written as a sum of positive squares in 4 ways, for example, as 83137924 + 2068066576 = 9118^2 + 45476^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2150705 + ... + 2151704.

It is an arithmetic number, because the mean of its divisors is an integer number (195759655).

Almost surely, 2^2151204500 is an apocalyptic number.

2151204500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151204500 is an abundant number, since it is smaller than the sum of its proper divisors (2547027220).

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

2151204500 is a wasteful number, since it uses less digits than its factorization.

2151204500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4302428 (or 4302416 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2151204500 is about 46381.0791163811. The cubic root of 2151204500 is about 1290.9038594674.

The spelling of 2151204500 in words is "two billion, one hundred fifty-one million, two hundred four thousand, five hundred".