221424888 has 32 divisors (see below), whose sum is σ = 566438400. Its totient is φ = 72091488.

The previous prime is 221424871. The next prime is 221424893. The reversal of 221424888 is 888424122.

It is a nude number because it is divisible by every one of its digits.

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, 106248 + ... + 108311.

It is an arithmetic number, because the mean of its divisors is an integer number (17701200).

Almost surely, 2^221424888 is an apocalyptic number.

It is an amenable number.

221424888 is an abundant number, since it is smaller than the sum of its proper divisors (345013512).

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

221424888 is a wasteful number, since it uses less digits than its factorization.

221424888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214611 (or 214607 counting only the distinct ones).

The product of its digits is 65536, while the sum is 39.

The square root of 221424888 is about 14880.3524151816. The cubic root of 221424888 is about 604.9815699142.

The spelling of 221424888 in words is "two hundred twenty-one million, four hundred twenty-four thousand, eight hundred eighty-eight".