2151545100 has 144 divisors (see below), whose sum is σ = 6332928000. Its totient is φ = 563915520.

The previous prime is 2151545089. The next prime is 2151545117. The reversal of 2151545100 is 15451512.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5676711 + ... + 5677089.

Almost surely, 2^2151545100 is an apocalyptic number.

2151545100 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 2151545100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3166464000).

2151545100 is an abundant number, since it is smaller than the sum of its proper divisors (4181382900).

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

2151545100 is a wasteful number, since it uses less digits than its factorization.

2151545100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 2151545100 is about 46384.7507269361. The cubic root of 2151545100 is about 1290.9719854330.

Adding to 2151545100 its reverse (15451512), we get a palindrome (2166996612).

The spelling of 2151545100 in words is "two billion, one hundred fifty-one million, five hundred forty-five thousand, one hundred".