221063444 has 24 divisors (see below), whose sum is σ = 468135360. Its totient is φ = 89168256.

The previous prime is 221063429. The next prime is 221063459. The reversal of 221063444 is 444360122.

It is an interprime number because it is at equal distance from previous prime (221063429) and next prime (221063459).

It is a super-2 number, since 2×221063444² = 97738092546282272, which contains 22 as substring.

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, 231734 + ... + 232685.

It is an arithmetic number, because the mean of its divisors is an integer number (19505640).

Almost surely, 2^221063444 is an apocalyptic number.

It is an amenable number.

221063444 is an abundant number, since it is smaller than the sum of its proper divisors (247071916).

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

221063444 is a wasteful number, since it uses less digits than its factorization.

221063444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464447 (or 464445 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 221063444 is about 14868.2024468326. The cubic root of 221063444 is about 604.6522090953.

The spelling of 221063444 in words is "two hundred twenty-one million, sixty-three thousand, four hundred forty-four".