220853813 has 4 divisors (see below), whose sum is σ = 220883808. Its totient is φ = 220823820.

The previous prime is 220853803. The next prime is 220853833. The reversal of 220853813 is 318358022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 318358022 = 2 ⋅159179011.

It is a cyclic number.

It is not a de Polignac number, because 220853813 - 2¹⁶ = 220788277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220853813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220853803) 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, 4478 + ... + 21488.

It is an arithmetic number, because the mean of its divisors is an integer number (55220952).

Almost surely, 2^220853813 is an apocalyptic number.

It is an amenable number.

220853813 is a deficient number, since it is larger than the sum of its proper divisors (29995).

220853813 is a wasteful number, since it uses less digits than its factorization.

220853813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29994.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 220853813 is about 14861.1511330718. The cubic root of 220853813 is about 604.4610212440.

The spelling of 220853813 in words is "two hundred twenty million, eight hundred fifty-three thousand, eight hundred thirteen".