201021413 has 16 divisors (see below), whose sum is σ = 217954800. Its totient is φ = 184704000.

The previous prime is 201021367. The next prime is 201021419. The reversal of 201021413 is 314120102.

It can be written as a sum of positive squares in 8 ways, for example, as 92486689 + 108534724 = 9617^2 + 10418^2 .

It is a cyclic number.

It is not a de Polignac number, because 201021413 - 2²⁰ = 199972837 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 (201021419) 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, 153863 + ... + 155163.

It is an arithmetic number, because the mean of its divisors is an integer number (13622175).

Almost surely, 2^201021413 is an apocalyptic number.

It is an amenable number.

201021413 is a deficient number, since it is larger than the sum of its proper divisors (16933387).

201021413 is a wasteful number, since it uses less digits than its factorization.

201021413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 201021413 is about 14178.2020369298. The cubic root of 201021413 is about 585.7974009101.

Adding to 201021413 its reverse (314120102), we get a palindrome (515141515).

The spelling of 201021413 in words is "two hundred one million, twenty-one thousand, four hundred thirteen".