201822420 has 48 divisors (see below), whose sum is σ = 580382208. Its totient is φ = 52364160.

The previous prime is 201822391. The next prime is 201822433. The reversal of 201822420 is 24228102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43236 + ... + 47675.

It is an arithmetic number, because the mean of its divisors is an integer number (12091296).

Almost surely, 2^201822420 is an apocalyptic number.

201822420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201822420 is an abundant number, since it is smaller than the sum of its proper divisors (378559788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201822420 is a wasteful number, since it uses less digits than its factorization.

201822420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90960 (or 90958 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 201822420 is about 14206.4217873467. The cubic root of 201822420 is about 586.5744424303.

The spelling of 201822420 in words is "two hundred one million, eight hundred twenty-two thousand, four hundred twenty".