201220390 has 32 divisors (see below), whose sum is σ = 419779584. Its totient is φ = 68016480.

The previous prime is 201220337. The next prime is 201220391. The reversal of 201220390 is 93022102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15274 + ... + 25213.

It is an arithmetic number, because the mean of its divisors is an integer number (13118112).

Almost surely, 2^201220390 is an apocalyptic number.

201220390 is an abundant number, since it is smaller than the sum of its proper divisors (218559194).

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

201220390 is a wasteful number, since it uses less digits than its factorization.

201220390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40572.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 201220390 is about 14185.2173053500. The cubic root of 201220390 is about 585.9906170963.

Adding to 201220390 its reverse (93022102), we get a palindrome (294242492).

The spelling of 201220390 in words is "two hundred one million, two hundred twenty thousand, three hundred ninety".