220208081 has 4 divisors (see below), whose sum is σ = 231798000. Its totient is φ = 208618164.

The previous prime is 220208071. The next prime is 220208083. The reversal of 220208081 is 180802022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180802022 = 2 ⋅90401011.

It is a cyclic number.

It is not a de Polignac number, because 220208081 - 2⁶ = 220208017 is a prime.

It is a super-2 number, since 2×220208081² = 96983197875405122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220208083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5794931 + ... + 5794968.

It is an arithmetic number, because the mean of its divisors is an integer number (57949500).

Almost surely, 2^220208081 is an apocalyptic number.

It is an amenable number.

220208081 is a deficient number, since it is larger than the sum of its proper divisors (11589919).

220208081 is a wasteful number, since it uses less digits than its factorization.

220208081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11589918.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 220208081 is about 14839.4097254574. The cubic root of 220208081 is about 603.8713387998.

The spelling of 220208081 in words is "two hundred twenty million, two hundred eight thousand, eighty-one".