427721222 has 8 divisors (see below), whose sum is σ = 643431816. Its totient is φ = 213243952.

The previous prime is 427721219. The next prime is 427721227. The reversal of 427721222 is 222127724.

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 (427721227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307463 + ... + 308850.

It is an arithmetic number, because the mean of its divisors is an integer number (80428977).

Almost surely, 2^427721222 is an apocalyptic number.

427721222 is a deficient number, since it is larger than the sum of its proper divisors (215710594).

427721222 is a wasteful number, since it uses less digits than its factorization.

427721222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616662.

The product of its digits is 6272, while the sum is 29.

The square root of 427721222 is about 20681.4221464579. The cubic root of 427721222 is about 753.4485469142.

Adding to 427721222 its reverse (222127724), we get a palindrome (649848946).

The spelling of 427721222 in words is "four hundred twenty-seven million, seven hundred twenty-one thousand, two hundred twenty-two".