220444521 has 8 divisors (see below), whose sum is σ = 320646624. Its totient is φ = 133602720.

The previous prime is 220444513. The next prime is 220444529. The reversal of 220444521 is 125444022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (220444513) and next prime (220444529).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220444521 - 2³ = 220444513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220444491 and 220444500.

It is not an unprimeable number, because it can be changed into a prime (220444529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3340036 + ... + 3340101.

It is an arithmetic number, because the mean of its divisors is an integer number (40080828).

Almost surely, 2^220444521 is an apocalyptic number.

It is an amenable number.

220444521 is a deficient number, since it is larger than the sum of its proper divisors (100202103).

220444521 is a wasteful number, since it uses less digits than its factorization.

220444521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6680151.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 220444521 is about 14847.3742122976. The cubic root of 220444521 is about 604.0873894066.

Adding to 220444521 its reverse (125444022), we get a palindrome (345888543).

It can be divided in two parts, 22044 and 4521, that added together give a triangular number (26565 = T₂₃₀).

The spelling of 220444521 in words is "two hundred twenty million, four hundred forty-four thousand, five hundred twenty-one".