201621340 has 36 divisors (see below), whose sum is σ = 438545016. Its totient is φ = 77861056.

The previous prime is 201621317. The next prime is 201621361. The reversal of 201621340 is 43126102.

201621340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10827 + ... + 22813.

It is an arithmetic number, because the mean of its divisors is an integer number (12181806).

Almost surely, 2^201621340 is an apocalyptic number.

201621340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201621340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219272508).

201621340 is an abundant number, since it is smaller than the sum of its proper divisors (236923676).

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

201621340 is a wasteful number, since it uses less digits than its factorization.

201621340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12054 (or 12023 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 201621340 is about 14199.3429425449. The cubic root of 201621340 is about 586.3795721378.

Adding to 201621340 its reverse (43126102), we get a palindrome (244747442).

The spelling of 201621340 in words is "two hundred one million, six hundred twenty-one thousand, three hundred forty".