23531455 has 4 divisors (see below), whose sum is σ = 28237752. Its totient is φ = 18825160.

The previous prime is 23531447. The next prime is 23531467. The reversal of 23531455 is 55413532.

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

It is not a de Polignac number, because 23531455 - 2³ = 23531447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2353141 + ... + 2353150.

It is an arithmetic number, because the mean of its divisors is an integer number (7059438).

Almost surely, 2^23531455 is an apocalyptic number.

23531455 is a deficient number, since it is larger than the sum of its proper divisors (4706297).

23531455 is an equidigital number, since it uses as much as digits as its factorization.

23531455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4706296.

The product of its digits is 9000, while the sum is 28.

The square root of 23531455 is about 4850.9231080280. The cubic root of 23531455 is about 286.5604565677.

Adding to 23531455 its reverse (55413532), we get a palindrome (78944987).

The spelling of 23531455 in words is "twenty-three million, five hundred thirty-one thousand, four hundred fifty-five".