221045622 has 64 divisors (see below), whose sum is σ = 524319744. Its totient is φ = 60808320.

The previous prime is 221045621. The next prime is 221045633. The reversal of 221045622 is 226540122.

It is a happy number.

It is a super-2 number, since 2×221045622² = 97722334010733768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221045592 and 221045601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221045621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159372 + ... + 160752.

It is an arithmetic number, because the mean of its divisors is an integer number (8192496).

Almost surely, 2^221045622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221045622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262159872).

221045622 is an abundant number, since it is smaller than the sum of its proper divisors (303274122).

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

221045622 is a wasteful number, since it uses less digits than its factorization.

221045622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 221045622 is about 14867.6031020471. The cubic root of 221045622 is about 604.6359597612.

Adding to 221045622 its reverse (226540122), we get a palindrome (447585744).

The spelling of 221045622 in words is "two hundred twenty-one million, forty-five thousand, six hundred twenty-two".