2157015120 has 160 divisors (see below), whose sum is σ = 7234953600. Its totient is φ = 528463872.

The previous prime is 2157015089. The next prime is 2157015121. The reversal of 2157015120 is 215107512.

It is a super-2 number, since 2×2157015120² = 9305428455817228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157015121) 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, 712971 + ... + 715989.

It is an arithmetic number, because the mean of its divisors is an integer number (45218460).

Almost surely, 2^2157015120 is an apocalyptic number.

2157015120 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 2157015120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3617476800).

2157015120 is an abundant number, since it is smaller than the sum of its proper divisors (5077938480).

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

2157015120 is a wasteful number, since it uses less digits than its factorization.

2157015120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277 (or 3271 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 2157015120 is about 46443.6768570276. The cubic root of 2157015120 is about 1292.0651016600.

The spelling of 2157015120 in words is "two billion, one hundred fifty-seven million, fifteen thousand, one hundred twenty".