23522421 has 16 divisors (see below), whose sum is σ = 33937344. Its totient is φ = 14406144.

The previous prime is 23522413. The next prime is 23522423. The reversal of 23522421 is 12422532.

It is not a de Polignac number, because 23522421 - 2³ = 23522413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23522423) 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, 7525 + ... + 10181.

It is an arithmetic number, because the mean of its divisors is an integer number (2121084).

Almost surely, 2^23522421 is an apocalyptic number.

It is an amenable number.

23522421 is a deficient number, since it is larger than the sum of its proper divisors (10414923).

23522421 is a wasteful number, since it uses less digits than its factorization.

23522421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900.

The product of its digits is 960, while the sum is 21.

The square root of 23522421 is about 4849.9918556633. The cubic root of 23522421 is about 286.5237805735.

Adding to 23522421 its reverse (12422532), we get a palindrome (35944953).

The spelling of 23522421 in words is "twenty-three million, five hundred twenty-two thousand, four hundred twenty-one".