221965382 has 4 divisors (see below), whose sum is σ = 332948076. Its totient is φ = 110982690.

The previous prime is 221965339. The next prime is 221965417. The reversal of 221965382 is 283569122.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55491344 + ... + 55491347.

It is an arithmetic number, because the mean of its divisors is an integer number (83237019).

Almost surely, 2^221965382 is an apocalyptic number.

221965382 is a deficient number, since it is larger than the sum of its proper divisors (110982694).

221965382 is a wasteful number, since it uses less digits than its factorization.

221965382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110982693.

The product of its digits is 51840, while the sum is 38.

The square root of 221965382 is about 14898.5026764437. The cubic root of 221965382 is about 605.4734194888.

The spelling of 221965382 in words is "two hundred twenty-one million, nine hundred sixty-five thousand, three hundred eighty-two".