201621413 has 4 divisors (see below), whose sum is σ = 230424480. Its totient is φ = 172818348.

The previous prime is 201621403. The next prime is 201621419. The reversal of 201621413 is 314126102.

201621413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201621413 - 2¹⁰ = 201620389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201621419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14401523 + ... + 14401536.

It is an arithmetic number, because the mean of its divisors is an integer number (57606120).

Almost surely, 2^201621413 is an apocalyptic number.

It is an amenable number.

201621413 is a deficient number, since it is larger than the sum of its proper divisors (28803067).

201621413 is an equidigital number, since it uses as much as digits as its factorization.

201621413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28803066.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 201621413 is about 14199.3455130862. The cubic root of 201621413 is about 586.3796429069.

Adding to 201621413 its reverse (314126102), we get a palindrome (515747515).

The spelling of 201621413 in words is "two hundred one million, six hundred twenty-one thousand, four hundred thirteen".