220957243 has 16 divisors (see below), whose sum is σ = 247324672. Its totient is φ = 196020000.

The previous prime is 220957237. The next prime is 220957249. The reversal of 220957243 is 342759022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (220957237) and next prime (220957249).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220957243 is a prime.

It is a super-2 number, since 2×220957243² = 97644206468322098, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220957199 and 220957208.

It is not an unprimeable number, because it can be changed into a prime (220957249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59038 + ... + 62668.

It is an arithmetic number, because the mean of its divisors is an integer number (15457792).

Almost surely, 2^220957243 is an apocalyptic number.

220957243 is a deficient number, since it is larger than the sum of its proper divisors (26367429).

220957243 is a wasteful number, since it uses less digits than its factorization.

220957243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3826.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 220957243 is about 14864.6306042229. The cubic root of 220957243 is about 604.5553666777. Note that the first 3 decimals are identical.

The spelling of 220957243 in words is "two hundred twenty million, nine hundred fifty-seven thousand, two hundred forty-three".