220984597 has 4 divisors (see below), whose sum is σ = 223467660. Its totient is φ = 218501536.

The previous prime is 220984591. The next prime is 220984601. The reversal of 220984597 is 795489022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 795489022 = 2 ⋅397744511.

It can be written as a sum of positive squares in 2 ways, for example, as 52867441 + 168117156 = 7271^2 + 12966^2 .

It is a cyclic number.

It is not a de Polignac number, because 220984597 - 2⁷ = 220984469 is a prime.

It is a super-2 number, since 2×220984597² = 97668384222504818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220984591) 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, 1241398 + ... + 1241575.

It is an arithmetic number, because the mean of its divisors is an integer number (55866915).

Almost surely, 2^220984597 is an apocalyptic number.

It is an amenable number.

220984597 is a deficient number, since it is larger than the sum of its proper divisors (2483063).

220984597 is an equidigital number, since it uses as much as digits as its factorization.

220984597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483062.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 220984597 is about 14865.5506793391. The cubic root of 220984597 is about 604.5803131710.

The spelling of 220984597 in words is "two hundred twenty million, nine hundred eighty-four thousand, five hundred ninety-seven".