21323301 has 8 divisors (see below), whose sum is σ = 29927520. Its totient is φ = 13467312.

The previous prime is 21323297. The next prime is 21323311. The reversal of 21323301 is 10332312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21323301 - 2² = 21323297 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186990 + ... + 187103.

It is an arithmetic number, because the mean of its divisors is an integer number (3740940).

Almost surely, 2^21323301 is an apocalyptic number.

21323301 is the 2921-st centered pentagonal number.

It is an amenable number.

21323301 is a deficient number, since it is larger than the sum of its proper divisors (8604219).

21323301 is a wasteful number, since it uses less digits than its factorization.

21323301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374115.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 21323301 is about 4617.7159938654. The cubic root of 21323301 is about 277.3010277271.

Adding to 21323301 its reverse (10332312), we get a palindrome (31655613).

The spelling of 21323301 in words is "twenty-one million, three hundred twenty-three thousand, three hundred one".