2151023900 has 36 divisors (see below), whose sum is σ = 4687304160. Its totient is φ = 856800000.

The previous prime is 2151023893. The next prime is 2151023977. The reversal of 2151023900 is 93201512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21101 + ... + 68900.

Almost surely, 2^2151023900 is an apocalyptic number.

2151023900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151023900 is an abundant number, since it is smaller than the sum of its proper divisors (2536280260).

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

2151023900 is a wasteful number, since it uses less digits than its factorization.

2151023900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90254 (or 90247 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 2151023900 is about 46379.1321609191. The cubic root of 2151023900 is about 1290.8677333867.

The spelling of 2151023900 in words is "two billion, one hundred fifty-one million, twenty-three thousand, nine hundred".