221422024 has 8 divisors (see below), whose sum is σ = 415166310. Its totient is φ = 110711008.

The previous prime is 221422013. The next prime is 221422037. The reversal of 221422024 is 420224122.

It can be written as a sum of positive squares in only one way, i.e., 123609924 + 97812100 = 11118^2 + 9890^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 221421992 and 221422010.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13838869 + ... + 13838884.

Almost surely, 2^221422024 is an apocalyptic number.

It is an amenable number.

221422024 is a deficient number, since it is larger than the sum of its proper divisors (193744286).

221422024 is a wasteful number, since it uses less digits than its factorization.

221422024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27677759 (or 27677755 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 221422024 is about 14880.2561805904. The cubic root of 221422024 is about 604.9789615433.

Adding to 221422024 its reverse (420224122), we get a palindrome (641646146).

The spelling of 221422024 in words is "two hundred twenty-one million, four hundred twenty-two thousand, twenty-four".