21233201 has 6 divisors (see below), whose sum is σ = 23339106. Its totient is φ = 19302800.

The previous prime is 21233197. The next prime is 21233213. The reversal of 21233201 is 10233212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12082576 + 9150625 = 3476^2 + 3025^2 .

It is not a de Polignac number, because 21233201 - 2² = 21233197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24233201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87620 + ... + 87861.

It is an arithmetic number, because the mean of its divisors is an integer number (3889851).

Almost surely, 2^21233201 is an apocalyptic number.

It is an amenable number.

21233201 is a deficient number, since it is larger than the sum of its proper divisors (2105905).

21233201 is a wasteful number, since it uses less digits than its factorization.

21233201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175503 (or 175492 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21233201 is about 4607.9497610109. The cubic root of 21233201 is about 276.9099047965.

Adding to 21233201 its reverse (10233212), we get a palindrome (31466413).

The spelling of 21233201 in words is "twenty-one million, two hundred thirty-three thousand, two hundred one".