220849647 has 4 divisors (see below), whose sum is σ = 294466200. Its totient is φ = 147233096.

The previous prime is 220849631. The next prime is 220849649. The reversal of 220849647 is 746948022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220849647 - 2⁴ = 220849631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220849599 and 220849608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220849649) 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, 36808272 + ... + 36808277.

It is an arithmetic number, because the mean of its divisors is an integer number (73616550).

Almost surely, 2^220849647 is an apocalyptic number.

220849647 is a deficient number, since it is larger than the sum of its proper divisors (73616553).

220849647 is an equidigital number, since it uses as much as digits as its factorization.

220849647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73616552.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 220849647 is about 14861.0109683023. The cubic root of 220849647 is about 604.4572205392.

The spelling of 220849647 in words is "two hundred twenty million, eight hundred forty-nine thousand, six hundred forty-seven".