2161744330 has 16 divisors (see below), whose sum is σ = 3891847680. Its totient is φ = 864540432.

The previous prime is 2161744307. The next prime is 2161744349. The reversal of 2161744330 is 334471612.

It is a junction number, because it is equal to n+sod(n) for n = 2161744292 and 2161744301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49711 + ... + 82429.

It is an arithmetic number, because the mean of its divisors is an integer number (243240480).

Almost surely, 2^2161744330 is an apocalyptic number.

2161744330 is a deficient number, since it is larger than the sum of its proper divisors (1730103350).

2161744330 is a wasteful number, since it uses less digits than its factorization.

2161744330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39333.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 2161744330 is about 46494.5623702385. The cubic root of 2161744330 is about 1293.0086875284.

The spelling of 2161744330 in words is "two billion, one hundred sixty-one million, seven hundred forty-four thousand, three hundred thirty".