201435221 has 4 divisors (see below), whose sum is σ = 216930252. Its totient is φ = 185940192.

The previous prime is 201435217. The next prime is 201435229. The reversal of 201435221 is 122534102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64802500 + 136632721 = 8050^2 + 11689^2 .

It is a cyclic number.

It is not a de Polignac number, because 201435221 - 2² = 201435217 is a prime.

It is a super-2 number, since 2×201435221² = 81152296518637682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201435193 and 201435202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201435229) 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, 7747496 + ... + 7747521.

It is an arithmetic number, because the mean of its divisors is an integer number (54232563).

Almost surely, 2^201435221 is an apocalyptic number.

It is an amenable number.

201435221 is a deficient number, since it is larger than the sum of its proper divisors (15495031).

201435221 is a wasteful number, since it uses less digits than its factorization.

201435221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15495030.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 201435221 is about 14192.7876402066. The cubic root of 201435221 is about 586.1990853260.

Adding to 201435221 its reverse (122534102), we get a palindrome (323969323).

The spelling of 201435221 in words is "two hundred one million, four hundred thirty-five thousand, two hundred twenty-one".