23434521 has 16 divisors (see below), whose sum is σ = 34442688. Its totient is φ = 14054400.

The previous prime is 23434519. The next prime is 23434531. The reversal of 23434521 is 12543432.

It is not a de Polignac number, because 23434521 - 2¹ = 23434519 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 23434491 and 23434500.

It is not an unprimeable number, because it can be changed into a prime (23434511) 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, 460 + ... + 6861.

It is an arithmetic number, because the mean of its divisors is an integer number (2152668).

Almost surely, 2^23434521 is an apocalyptic number.

It is an amenable number.

23434521 is a deficient number, since it is larger than the sum of its proper divisors (11008167).

23434521 is a wasteful number, since it uses less digits than its factorization.

23434521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7432.

The product of its digits is 2880, while the sum is 24.

The square root of 23434521 is about 4840.9215031851. The cubic root of 23434521 is about 286.1664353113.

Adding to 23434521 its reverse (12543432), we get a palindrome (35977953).

The spelling of 23434521 in words is "twenty-three million, four hundred thirty-four thousand, five hundred twenty-one".