23214521 has 8 divisors (see below), whose sum is σ = 26426304. Its totient is φ = 20186320.

The previous prime is 23214509. The next prime is 23214533. The reversal of 23214521 is 12541232.

It is an interprime number because it is at equal distance from previous prime (23214509) and next prime (23214533).

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

It is a de Polignac number, because none of the positive numbers 2^k-23214521 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23214493 and 23214502.

It is not an unprimeable number, because it can be changed into a prime (23214551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45626 + ... + 46131.

It is an arithmetic number, because the mean of its divisors is an integer number (3303288).

Almost surely, 2^23214521 is an apocalyptic number.

It is an amenable number.

23214521 is a deficient number, since it is larger than the sum of its proper divisors (3211783).

23214521 is a wasteful number, since it uses less digits than its factorization.

23214521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91791.

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

The square root of 23214521 is about 4818.1449749878. The cubic root of 23214521 is about 285.2681215369.

Adding to 23214521 its reverse (12541232), we get a palindrome (35755753).

Subtracting from 23214521 its reverse (12541232), we obtain a square (10673289 = 3267²).

The spelling of 23214521 in words is "twenty-three million, two hundred fourteen thousand, five hundred twenty-one".