21532341 has 8 divisors (see below), whose sum is σ = 28765024. Its totient is φ = 14327280.

The previous prime is 21532337. The next prime is 21532361. The reversal of 21532341 is 14323512.

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

It is not a de Polignac number, because 21532341 - 2² = 21532337 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 (21532361) 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, 5011 + ... + 8256.

It is an arithmetic number, because the mean of its divisors is an integer number (3595628).

Almost surely, 2^21532341 is an apocalyptic number.

It is an amenable number.

21532341 is a deficient number, since it is larger than the sum of its proper divisors (7232683).

21532341 is a wasteful number, since it uses less digits than its factorization.

21532341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13811.

The product of its digits is 720, while the sum is 21.

The square root of 21532341 is about 4640.2953569789. The cubic root of 21532341 is about 278.2042432281.

Adding to 21532341 its reverse (14323512), we get a palindrome (35855853).

The spelling of 21532341 in words is "twenty-one million, five hundred thirty-two thousand, three hundred forty-one".