221887422 has 24 divisors (see below), whose sum is σ = 481040976. Its totient is φ = 73918656.

The previous prime is 221887411. The next prime is 221887433. The reversal of 221887422 is 224788122.

221887422 is a `hidden beast` number, since 221 + 8 + 8 + 7 + 422 = 666.

It is an interprime number because it is at equal distance from previous prime (221887411) and next prime (221887433).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45318 + ... + 49974.

It is an arithmetic number, because the mean of its divisors is an integer number (20043374).

Almost surely, 2^221887422 is an apocalyptic number.

221887422 is an abundant number, since it is smaller than the sum of its proper divisors (259153554).

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

221887422 is a wasteful number, since it uses less digits than its factorization.

221887422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7312 (or 7309 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 221887422 is about 14895.8860763635. The cubic root of 221887422 is about 605.4025251978.

The spelling of 221887422 in words is "two hundred twenty-one million, eight hundred eighty-seven thousand, four hundred twenty-two".