2151233500 has 96 divisors (see below), whose sum is σ = 5098242240. Its totient is φ = 788256000.

The previous prime is 2151233479. The next prime is 2151233509. The reversal of 2151233500 is 53321512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151233509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 902310 + ... + 904690.

It is an arithmetic number, because the mean of its divisors is an integer number (53106690).

Almost surely, 2^2151233500 is an apocalyptic number.

2151233500 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 2151233500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2549121120).

2151233500 is an abundant number, since it is smaller than the sum of its proper divisors (2947008740).

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

2151233500 is a wasteful number, since it uses less digits than its factorization.

2151233500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552 (or 2540 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 2151233500 is about 46381.3917428100. The cubic root of 2151233500 is about 1290.9096602553.

The spelling of 2151233500 in words is "two billion, one hundred fifty-one million, two hundred thirty-three thousand, five hundred".