23154521 has 12 divisors (see below), whose sum is σ = 26395920. Its totient is φ = 20245680.

The previous prime is 23154497. The next prime is 23154529. The reversal of 23154521 is 12545132.

It is not a de Polignac number, because 23154521 - 2⁶ = 23154457 is a prime.

It is a super-2 number, since 2×23154521² = 1072263685478882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23154529) 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 11 ways as a sum of consecutive naturals, for example, 395 + ... + 6816.

It is an arithmetic number, because the mean of its divisors is an integer number (2199660).

Almost surely, 2^23154521 is an apocalyptic number.

It is an amenable number.

23154521 is a deficient number, since it is larger than the sum of its proper divisors (3241399).

23154521 is a wasteful number, since it uses less digits than its factorization.

23154521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7256 (or 7243 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 23154521 is about 4811.9144838619. The cubic root of 23154521 is about 285.0221425291.

Adding to 23154521 its reverse (12545132), we get a palindrome (35699653).

The spelling of 23154521 in words is "twenty-three million, one hundred fifty-four thousand, five hundred twenty-one".