222420406 has 16 divisors (see below), whose sum is σ = 359715888. Its totient is φ = 102535200.

The previous prime is 222420397. The next prime is 222420421. The reversal of 222420406 is 604024222.

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, 19921 + ... + 29011.

It is an arithmetic number, because the mean of its divisors is an integer number (22482243).

Almost surely, 2^222420406 is an apocalyptic number.

222420406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

222420406 is a deficient number, since it is larger than the sum of its proper divisors (137295482).

222420406 is a wasteful number, since it uses less digits than its factorization.

222420406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10047.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 222420406 is about 14913.7656545891. The cubic root of 222420406 is about 605.8868726877.

Adding to 222420406 its reverse (604024222), we get a palindrome (826444628).

The spelling of 222420406 in words is "two hundred twenty-two million, four hundred twenty thousand, four hundred six".