2151070900 has 72 divisors (see below), whose sum is σ = 5100048576. Its totient is φ = 780998400.

The previous prime is 2151070897. The next prime is 2151070931. The reversal of 2151070900 is 90701512.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1029657 + ... + 1031743.

It is an arithmetic number, because the mean of its divisors is an integer number (70834008).

Almost surely, 2^2151070900 is an apocalyptic number.

2151070900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2151070900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2550024288).

2151070900 is an abundant number, since it is smaller than the sum of its proper divisors (2948977676).

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

2151070900 is a wasteful number, since it uses less digits than its factorization.

2151070900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3049 (or 3042 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 2151070900 is about 46379.6388515478. The cubic root of 2151070900 is about 1290.8771351638.

The spelling of 2151070900 in words is "two billion, one hundred fifty-one million, seventy thousand, nine hundred".