2161566310 has 32 divisors (see below), whose sum is σ = 3973808160. Its totient is φ = 846263808.

The previous prime is 2161566299. The next prime is 2161566311. The reversal of 2161566310 is 136651612.

It is a super-2 number, since 2×2161566310² = 9344737825054032200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161566311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224781 + ... + 234199.

It is an arithmetic number, because the mean of its divisors is an integer number (124181505).

Almost surely, 2^2161566310 is an apocalyptic number.

2161566310 is a deficient number, since it is larger than the sum of its proper divisors (1812241850).

2161566310 is a wasteful number, since it uses less digits than its factorization.

2161566310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9912.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 2161566310 is about 46492.6479134067. The cubic root of 2161566310 is about 1292.9731933950.

The spelling of 2161566310 in words is "two billion, one hundred sixty-one million, five hundred sixty-six thousand, three hundred ten".