201815022 has 32 divisors (see below), whose sum is σ = 419364864. Its totient is φ = 64677600.

The previous prime is 201815011. The next prime is 201815051. The reversal of 201815022 is 220518102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 201815022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25747 + ... + 32657.

It is an arithmetic number, because the mean of its divisors is an integer number (13105152).

Almost surely, 2^201815022 is an apocalyptic number.

201815022 is an abundant number, since it is smaller than the sum of its proper divisors (217549842).

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

201815022 is a wasteful number, since it uses less digits than its factorization.

201815022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7104.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 201815022 is about 14206.1614097546. The cubic root of 201815022 is about 586.5672751877.

The spelling of 201815022 in words is "two hundred one million, eight hundred fifteen thousand, twenty-two".