2152120660 has 12 divisors (see below), whose sum is σ = 4519453428. Its totient is φ = 860848256.

The previous prime is 2152120643. The next prime is 2152120681. The reversal of 2152120660 is 660212512.

It can be written as a sum of positive squares in 2 ways, for example, as 834285456 + 1317835204 = 28884^2 + 36302^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53802997 + ... + 53803036.

It is an arithmetic number, because the mean of its divisors is an integer number (376621119).

Almost surely, 2^2152120660 is an apocalyptic number.

2152120660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2152120660 is an abundant number, since it is smaller than the sum of its proper divisors (2367332768).

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

2152120660 is a wasteful number, since it uses less digits than its factorization.

2152120660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107606042 (or 107606040 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2152120660 is about 46390.9545062397. The cubic root of 2152120660 is about 1291.0870911756.

The spelling of 2152120660 in words is "two billion, one hundred fifty-two million, one hundred twenty thousand, six hundred sixty".