220123017 has 12 divisors (see below), whose sum is σ = 318086964. Its totient is φ = 146688000.

The previous prime is 220122997. The next prime is 220123031. The reversal of 220123017 is 710321022.

It can be written as a sum of positive squares in 2 ways, for example, as 54331641 + 165791376 = 7371^2 + 12876^2 .

It is not a de Polignac number, because 220123017 - 2¹⁵ = 220090249 is a prime.

It is a super-2 number, since 2×220123017² = 96908285226364578, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220123067) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32953 + ... + 39065.

It is an arithmetic number, because the mean of its divisors is an integer number (26507247).

Almost surely, 2^220123017 is an apocalyptic number.

It is an amenable number.

220123017 is a deficient number, since it is larger than the sum of its proper divisors (97963947).

220123017 is a wasteful number, since it uses less digits than its factorization.

220123017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10120 (or 10117 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 220123017 is about 14836.5432968734. The cubic root of 220123017 is about 603.7935724632.

Adding to 220123017 its reverse (710321022), we get a palindrome (930444039).

The spelling of 220123017 in words is "two hundred twenty million, one hundred twenty-three thousand, seventeen".