2156214620 has 192 divisors, whose sum is σ = 5660928000. Its totient is φ = 687536640.

The previous prime is 2156214589. The next prime is 2156214637. The reversal of 2156214620 is 264126512.

It is a super-2 number, since 2×2156214620² = 9298522975003488800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9254024 + ... + 9254256.

It is an arithmetic number, because the mean of its divisors is an integer number (29484000).

Almost surely, 2^2156214620 is an apocalyptic number.

2156214620 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 2156214620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2830464000).

2156214620 is an abundant number, since it is smaller than the sum of its proper divisors (3504713380).

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

2156214620 is a wasteful number, since it uses less digits than its factorization.

2156214620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 2156214620 is about 46435.0580919202. The cubic root of 2156214620 is about 1291.9052471033.

The spelling of 2156214620 in words is "two billion, one hundred fifty-six million, two hundred fourteen thousand, six hundred twenty".