201345221 has 16 divisors (see below), whose sum is σ = 256869888. Its totient is φ = 153241200.

The previous prime is 201345203. The next prime is 201345241. The reversal of 201345221 is 122543102.

It is a de Polignac number, because none of the positive numbers 2^k-201345221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201345193 and 201345202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201345241) 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, 27095 + ... + 33716.

It is an arithmetic number, because the mean of its divisors is an integer number (16054368).

Almost surely, 2^201345221 is an apocalyptic number.

It is an amenable number.

201345221 is a deficient number, since it is larger than the sum of its proper divisors (55524667).

201345221 is a wasteful number, since it uses less digits than its factorization.

201345221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60872.

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

The square root of 201345221 is about 14189.6166614888. The cubic root of 201345221 is about 586.1117689559. Note that the first 3 decimals are identical.

Adding to 201345221 its reverse (122543102), we get a palindrome (323888323).

The spelling of 201345221 in words is "two hundred one million, three hundred forty-five thousand, two hundred twenty-one".