2162566820 has 72 divisors (see below), whose sum is σ = 4792784640. Its totient is φ = 818792640.

The previous prime is 2162566811. The next prime is 2162566829. The reversal of 2162566820 is 286652612.

It is an interprime number because it is at equal distance from previous prime (2162566811) and next prime (2162566829).

It is not an unprimeable number, because it can be changed into a prime (2162566829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1368791 + ... + 1370369.

Almost surely, 2^2162566820 is an apocalyptic number.

2162566820 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 2162566820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2396392320).

2162566820 is an abundant number, since it is smaller than the sum of its proper divisors (2630217820).

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

2162566820 is a wasteful number, since it uses less digits than its factorization.

2162566820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713 (or 1664 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 2162566820 is about 46503.4065418868. The cubic root of 2162566820 is about 1293.1726526271.

The spelling of 2162566820 in words is "two billion, one hundred sixty-two million, five hundred sixty-six thousand, eight hundred twenty".