222471138 has 8 divisors (see below), whose sum is σ = 444942288. Its totient is φ = 74157044.

The previous prime is 222471127. The next prime is 222471167. The reversal of 222471138 is 831174222.

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

222471138 is an admirable number.

It is an unprimeable number.

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, 18539256 + ... + 18539267.

It is an arithmetic number, because the mean of its divisors is an integer number (55617786).

Almost surely, 2^222471138 is an apocalyptic number.

222471138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222471138 is a wasteful number, since it uses less digits than its factorization.

222471138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37078528.

The product of its digits is 5376, while the sum is 30.

The square root of 222471138 is about 14915.4664023623. The cubic root of 222471138 is about 605.9329348824.

The spelling of 222471138 in words is "two hundred twenty-two million, four hundred seventy-one thousand, one hundred thirty-eight".