23542521 has 4 divisors (see below), whose sum is σ = 31390032. Its totient is φ = 15695012.

The previous prime is 23542517. The next prime is 23542531. The reversal of 23542521 is 12524532.

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 23542521 - 2² = 23542517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23542491 and 23542500.

It is not an unprimeable number, because it can be changed into a prime (23542511) 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, 3923751 + ... + 3923756.

It is an arithmetic number, because the mean of its divisors is an integer number (7847508).

Almost surely, 2^23542521 is an apocalyptic number.

It is an amenable number.

23542521 is a deficient number, since it is larger than the sum of its proper divisors (7847511).

23542521 is an equidigital number, since it uses as much as digits as its factorization.

23542521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7847510.

The product of its digits is 2400, while the sum is 24.

The square root of 23542521 is about 4852.0635816114. The cubic root of 23542521 is about 286.6053692326.

The spelling of 23542521 in words is "twenty-three million, five hundred forty-two thousand, five hundred twenty-one".