2169579481 has 4 divisors (see below), whose sum is σ = 2186662912. Its totient is φ = 2152496052.

The previous prime is 2169579473. The next prime is 2169579499. The reversal of 2169579481 is 1849759612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2169579481 - 2³ = 2169579473 is a prime.

It is a super-2 number, since 2×2169579481² = 9414150248752458722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2169579281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8541525 + ... + 8541778.

It is an arithmetic number, because the mean of its divisors is an integer number (546665728).

Almost surely, 2^2169579481 is an apocalyptic number.

It is an amenable number.

2169579481 is a deficient number, since it is larger than the sum of its proper divisors (17083431).

2169579481 is a wasteful number, since it uses less digits than its factorization.

2169579481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17083430.

The product of its digits is 1088640, while the sum is 52.

The square root of 2169579481 is about 46578.7449487424. The cubic root of 2169579481 is about 1294.5689557899.

The spelling of 2169579481 in words is "two billion, one hundred sixty-nine million, five hundred seventy-nine thousand, four hundred eighty-one".