221374646 has 8 divisors (see below), whose sum is σ = 351595080. Its totient is φ = 104176288.

The previous prime is 221374639. The next prime is 221374649. The reversal of 221374646 is 646473122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221374649) 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, 3255476 + ... + 3255543.

It is an arithmetic number, because the mean of its divisors is an integer number (43949385).

Almost surely, 2^221374646 is an apocalyptic number.

221374646 is a deficient number, since it is larger than the sum of its proper divisors (130220434).

221374646 is a wasteful number, since it uses less digits than its factorization.

221374646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6511038.

The product of its digits is 48384, while the sum is 35.

The square root of 221374646 is about 14878.6641201420. The cubic root of 221374646 is about 604.9358090491.

The spelling of 221374646 in words is "two hundred twenty-one million, three hundred seventy-four thousand, six hundred forty-six".