218201822 has 4 divisors (see below), whose sum is σ = 327302736. Its totient is φ = 109100910.

The previous prime is 218201821. The next prime is 218201831. The reversal of 218201822 is 228102812.

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

It is a super-2 number, since 2×218201822² = 95224070248239368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 218201791 and 218201800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218201821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54550454 + ... + 54550457.

It is an arithmetic number, because the mean of its divisors is an integer number (81825684).

Almost surely, 2^218201822 is an apocalyptic number.

218201822 is a deficient number, since it is larger than the sum of its proper divisors (109100914).

218201822 is a wasteful number, since it uses less digits than its factorization.

218201822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109100913.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 218201822 is about 14771.6560344465. The cubic root of 218201822 is about 602.0318357133.

The spelling of 218201822 in words is "two hundred eighteen million, two hundred one thousand, eight hundred twenty-two".