2151187000 has 64 divisors (see below), whose sum is σ = 5050693440. Its totient is φ = 857584000.

The previous prime is 2151186997. The next prime is 2151187009. The reversal of 2151187000 is 7811512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151187009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307542 + ... + 314458.

It is an arithmetic number, because the mean of its divisors is an integer number (78917085).

Almost surely, 2^2151187000 is an apocalyptic number.

2151187000 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 2151187000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2525346720).

2151187000 is an abundant number, since it is smaller than the sum of its proper divisors (2899506440).

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

2151187000 is a wasteful number, since it uses less digits than its factorization.

2151187000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7249 (or 7235 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 2151187000 is about 46380.8904614821. The cubic root of 2151187000 is about 1290.9003589666.

Adding to 2151187000 its reverse (7811512), we get a palindrome (2158998512).

The spelling of 2151187000 in words is "two billion, one hundred fifty-one million, one hundred eighty-seven thousand".