201640223622 has 32 divisors (see below), whose sum is σ = 408522546432. Its totient is φ = 66343977504.

The previous prime is 201640223599. The next prime is 201640223623. The reversal of 201640223622 is 226322046102.

It is a self number, because there is not a number n which added to its sum of digits gives 201640223622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201640223623) 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, 341673 + ... + 721124.

It is an arithmetic number, because the mean of its divisors is an integer number (12766329576).

Almost surely, 2^201640223622 is an apocalyptic number.

201640223622 is an abundant number, since it is smaller than the sum of its proper divisors (206882322810).

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

201640223622 is a wasteful number, since it uses less digits than its factorization.

201640223622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063212.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 201640223622 its reverse (226322046102), we get a palindrome (427962269724).

The spelling of 201640223622 in words is "two hundred one billion, six hundred forty million, two hundred twenty-three thousand, six hundred twenty-two".