2218356829 has 8 divisors (see below), whose sum is σ = 2412654552. Its totient is φ = 2027438400.

The previous prime is 2218356797. The next prime is 2218356839. The reversal of 2218356829 is 9286538122.

It can be written as a sum of positive squares in 4 ways, for example, as 577296729 + 1641060100 = 24027^2 + 40510^2 .

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

It is not a de Polignac number, because 2218356829 - 2⁵ = 2218356797 is a prime.

It is a super-2 number, since 2×2218356829² = 9842214041541870482, 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 (2218356839) 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, 843454 + ... + 846079.

It is an arithmetic number, because the mean of its divisors is an integer number (301581819).

Almost surely, 2^2218356829 is an apocalyptic number.

It is an amenable number.

2218356829 is a deficient number, since it is larger than the sum of its proper divisors (194297723).

2218356829 is a wasteful number, since it uses less digits than its factorization.

2218356829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689647.

The product of its digits is 414720, while the sum is 46.

The square root of 2218356829 is about 47099.4355486348. The cubic root of 2218356829 is about 1304.1988161248.

The spelling of 2218356829 in words is "two billion, two hundred eighteen million, three hundred fifty-six thousand, eight hundred twenty-nine".