2161243469 has 8 divisors (see below), whose sum is σ = 2694537408. Its totient is φ = 1684085760.

The previous prime is 2161243457. The next prime is 2161243477. The reversal of 2161243469 is 9643421612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2161243469 - 2²⁰ = 2160194893 is a prime.

It is a super-2 number, since 2×2161243469² = 9341946664590307922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161243429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14033972 + ... + 14034125.

It is an arithmetic number, because the mean of its divisors is an integer number (336817176).

Almost surely, 2^2161243469 is an apocalyptic number.

It is an amenable number.

2161243469 is a deficient number, since it is larger than the sum of its proper divisors (533293939).

2161243469 is a wasteful number, since it uses less digits than its factorization.

2161243469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28068115.

The product of its digits is 62208, while the sum is 38.

The square root of 2161243469 is about 46489.1758262071. The cubic root of 2161243469 is about 1292.9088194670.

The spelling of 2161243469 in words is "two billion, one hundred sixty-one million, two hundred forty-three thousand, four hundred sixty-nine".