220669281 has 12 divisors (see below), whose sum is σ = 364279552. Its totient is φ = 126096696.

The previous prime is 220669271. The next prime is 220669303. The reversal of 220669281 is 182966022.

It is a happy number.

It is not a de Polignac number, because 220669281 - 2⁶ = 220669217 is a prime.

It is a super-2 number, since 2×220669281² = 97389863154113922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220669271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1751281 + ... + 1751406.

Almost surely, 2^220669281 is an apocalyptic number.

220669281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220669281 is a deficient number, since it is larger than the sum of its proper divisors (143610271).

220669281 is a wasteful number, since it uses less digits than its factorization.

220669281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502700 (or 3502697 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 220669281 is about 14854.9412991099. The cubic root of 220669281 is about 604.2926240584.

The spelling of 220669281 in words is "two hundred twenty million, six hundred sixty-nine thousand, two hundred eighty-one".