220281345 has 24 divisors (see below), whose sum is σ = 401918400. Its totient is φ = 111299616.

The previous prime is 220281331. The next prime is 220281349. The reversal of 220281345 is 543182022.

It is not a de Polignac number, because 220281345 - 2⁹ = 220280833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220281349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127965 + ... + 129674.

It is an arithmetic number, because the mean of its divisors is an integer number (16746600).

Almost surely, 2^220281345 is an apocalyptic number.

It is an amenable number.

220281345 is a deficient number, since it is larger than the sum of its proper divisors (181637055).

220281345 is a wasteful number, since it uses less digits than its factorization.

220281345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257669 (or 257666 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 220281345 is about 14841.8780819679. The cubic root of 220281345 is about 603.9383014108.

The spelling of 220281345 in words is "two hundred twenty million, two hundred eighty-one thousand, three hundred forty-five".