221046338 has 6 divisors (see below), whose sum is σ = 331601049. Its totient is φ = 110512656.

The previous prime is 221046317. The next prime is 221046341. The reversal of 221046338 is 833640122.

It can be written as a sum of positive squares in 2 ways, for example, as 113571649 + 107474689 = 10657^2 + 10367^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=10513.

It is a super-2 number, since 2×221046338² = 97722967086420488, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221046338.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15770 + ... + 26282.

Almost surely, 2^221046338 is an apocalyptic number.

221046338 is a deficient number, since it is larger than the sum of its proper divisors (110554711).

221046338 is an frugal number, since it uses more digits than its factorization.

221046338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21028 (or 10515 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 221046338 is about 14867.6271812283. The cubic root of 221046338 is about 604.6366125961.

The spelling of 221046338 in words is "two hundred twenty-one million, forty-six thousand, three hundred thirty-eight".