2151379880 has 256 divisors, whose sum is σ = 5791564800. Its totient is φ = 712212480.

The previous prime is 2151379829. The next prime is 2151379883. The reversal of 2151379880 is 889731512.

It is not an unprimeable number, because it can be changed into a prime (2151379883) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19038704 + ... + 19038816.

It is an arithmetic number, because the mean of its divisors is an integer number (22623300).

Almost surely, 2^2151379880 is an apocalyptic number.

2151379880 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 2151379880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2895782400).

2151379880 is an abundant number, since it is smaller than the sum of its proper divisors (3640184920).

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

2151379880 is a wasteful number, since it uses less digits than its factorization.

2151379880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 2151379880 is about 46382.9697194994. The cubic root of 2151379880 is about 1290.9389394372.

The spelling of 2151379880 in words is "two billion, one hundred fifty-one million, three hundred seventy-nine thousand, eight hundred eighty".