221365246 has 4 divisors (see below), whose sum is σ = 332047872. Its totient is φ = 110682622.

The previous prime is 221365223. The next prime is 221365297. The reversal of 221365246 is 642563122.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55341310 + ... + 55341313.

It is an arithmetic number, because the mean of its divisors is an integer number (83011968).

Almost surely, 2^221365246 is an apocalyptic number.

221365246 is a deficient number, since it is larger than the sum of its proper divisors (110682626).

221365246 is a wasteful number, since it uses less digits than its factorization.

221365246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110682625.

The product of its digits is 17280, while the sum is 31.

The square root of 221365246 is about 14878.3482282140. The cubic root of 221365246 is about 604.9272466758.

The spelling of 221365246 in words is "two hundred twenty-one million, three hundred sixty-five thousand, two hundred forty-six".