221363463 has 4 divisors (see below), whose sum is σ = 295151288. Its totient is φ = 147575640.

The previous prime is 221363459. The next prime is 221363531. The reversal of 221363463 is 364363122.

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

It is not a de Polignac number, because 221363463 - 2² = 221363459 is a prime.

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 221363463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221363423) 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, 36893908 + ... + 36893913.

It is an arithmetic number, because the mean of its divisors is an integer number (73787822).

Almost surely, 2^221363463 is an apocalyptic number.

221363463 is a deficient number, since it is larger than the sum of its proper divisors (73787825).

221363463 is an equidigital number, since it uses as much as digits as its factorization.

221363463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73787824.

The product of its digits is 15552, while the sum is 30.

The square root of 221363463 is about 14878.2883088076. The cubic root of 221363463 is about 604.9256225302.

The spelling of 221363463 in words is "two hundred twenty-one million, three hundred sixty-three thousand, four hundred sixty-three".