23534521 has 4 divisors (see below), whose sum is σ = 24773200. Its totient is φ = 22295844.

The previous prime is 23534519. The next prime is 23534531. The reversal of 23534521 is 12543532.

23534521 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23534521 - 2¹ = 23534519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23534501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619311 + ... + 619348.

It is an arithmetic number, because the mean of its divisors is an integer number (6193300).

Almost surely, 2^23534521 is an apocalyptic number.

It is an amenable number.

23534521 is a deficient number, since it is larger than the sum of its proper divisors (1238679).

23534521 is a wasteful number, since it uses less digits than its factorization.

23534521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238678.

The product of its digits is 3600, while the sum is 25.

The square root of 23534521 is about 4851.2391200599. The cubic root of 23534521 is about 286.5729016999.

The spelling of 23534521 in words is "twenty-three million, five hundred thirty-four thousand, five hundred twenty-one".