221463805 has 8 divisors (see below), whose sum is σ = 265944672. Its totient is φ = 177045648.

The previous prime is 221463797. The next prime is 221463871. The reversal of 221463805 is 508364122.

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

It is a cyclic number.

It is not a de Polignac number, because 221463805 - 2³ = 221463797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7519 + ... + 22348.

It is an arithmetic number, because the mean of its divisors is an integer number (33243084).

Almost surely, 2^221463805 is an apocalyptic number.

It is an amenable number.

221463805 is a deficient number, since it is larger than the sum of its proper divisors (44480867).

221463805 is a wasteful number, since it uses less digits than its factorization.

221463805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31355.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 221463805 is about 14881.6600216508. The cubic root of 221463805 is about 605.0170111101.

The spelling of 221463805 in words is "two hundred twenty-one million, four hundred sixty-three thousand, eight hundred five".