23154531 has 4 divisors (see below), whose sum is σ = 30872712. Its totient is φ = 15436352.

The previous prime is 23154529. The next prime is 23154533. The reversal of 23154531 is 13545132.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (23154529) and next prime (23154533).

It is a cyclic number.

It is not a de Polignac number, because 23154531 - 2¹ = 23154529 is a prime.

It is a super-2 number, since 2×23154531² = 1072264611659922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23154533) 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 3 ways as a sum of consecutive naturals, for example, 3859086 + ... + 3859091.

It is an arithmetic number, because the mean of its divisors is an integer number (7718178).

Almost surely, 2^23154531 is an apocalyptic number.

23154531 is a deficient number, since it is larger than the sum of its proper divisors (7718181).

23154531 is an equidigital number, since it uses as much as digits as its factorization.

23154531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7718180.

The product of its digits is 1800, while the sum is 24.

The square root of 23154531 is about 4811.9155229493. The cubic root of 23154531 is about 285.0221835610.

Adding to 23154531 its reverse (13545132), we get a palindrome (36699663).

The spelling of 23154531 in words is "twenty-three million, one hundred fifty-four thousand, five hundred thirty-one".