220851 has 12 divisors (see below), whose sum is σ = 325728. Its totient is φ = 144144.

The previous prime is 220841. The next prime is 220859. The reversal of 220851 is 158022.

It is not a de Polignac number, because 220851 - 2¹⁷ = 89779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220859) 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, 246 + ... + 708.

It is an arithmetic number, because the mean of its divisors is an integer number (27144).

2²²⁰⁸⁵¹ is an apocalyptic number.

220851 is a deficient number, since it is larger than the sum of its proper divisors (104877).

220851 is a wasteful number, since it uses less digits than its factorization.

220851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 220851 is about 469.9478694494. The cubic root of 220851 is about 60.4458454907.

Adding to 220851 its reverse (158022), we get a palindrome (378873).

The spelling of 220851 in words is "two hundred twenty thousand, eight hundred fifty-one".