2161020292 has 48 divisors (see below), whose sum is σ = 4173087744. Its totient is φ = 975744000.

The previous prime is 2161020217. The next prime is 2161020293. The reversal of 2161020292 is 2920201612.

It is not an unprimeable number, because it can be changed into a prime (2161020293) 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, 107692 + ... + 126172.

It is an arithmetic number, because the mean of its divisors is an integer number (86939328).

Almost surely, 2^2161020292 is an apocalyptic number.

It is an amenable number.

2161020292 is a deficient number, since it is larger than the sum of its proper divisors (2012067452).

2161020292 is a wasteful number, since it uses less digits than its factorization.

2161020292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18580 (or 18578 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2161020292 is about 46486.7754528102. The cubic root of 2161020292 is about 1292.8643146177.

The spelling of 2161020292 in words is "two billion, one hundred sixty-one million, twenty thousand, two hundred ninety-two".