221423882 has 8 divisors (see below), whose sum is σ = 333857316. Its totient is φ = 110138112.

The previous prime is 221423879. The next prime is 221423933. The reversal of 221423882 is 288324122.

It can be written as a sum of positive squares in 2 ways, for example, as 214300321 + 7123561 = 14639^2 + 2669^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286433 + ... + 287204.

Almost surely, 2^221423882 is an apocalyptic number.

221423882 is a deficient number, since it is larger than the sum of its proper divisors (112433434).

221423882 is a wasteful number, since it uses less digits than its factorization.

221423882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573832.

The product of its digits is 12288, while the sum is 32.

The square root of 221423882 is about 14880.3186121803. The cubic root of 221423882 is about 604.9806537083.

The spelling of 221423882 in words is "two hundred twenty-one million, four hundred twenty-three thousand, eight hundred eighty-two".