220573981 has 8 divisors (see below), whose sum is σ = 222709760. Its totient is φ = 218444688.

The previous prime is 220573967. The next prime is 220573993. The reversal of 220573981 is 189375022.

220573981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 220573981 - 2⁵ = 220573949 is a prime.

It is a super-2 number, since 2×220573981² = 97305762188376722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220573981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220573901) 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, 91135 + ... + 93523.

It is an arithmetic number, because the mean of its divisors is an integer number (27838720).

Almost surely, 2^220573981 is an apocalyptic number.

It is an amenable number.

220573981 is a deficient number, since it is larger than the sum of its proper divisors (2135779).

220573981 is a wasteful number, since it uses less digits than its factorization.

220573981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 220573981 is about 14851.7332658515. The cubic root of 220573981 is about 604.2056199844.

The spelling of 220573981 in words is "two hundred twenty million, five hundred seventy-three thousand, nine hundred eighty-one".