23155553 has 4 divisors (see below), whose sum is σ = 23548080. Its totient is φ = 22763028.

The previous prime is 23155523. The next prime is 23155567. The reversal of 23155553 is 35555132.

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 23155553 - 2¹⁰ = 23154529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23155523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196175 + ... + 196292.

It is an arithmetic number, because the mean of its divisors is an integer number (5887020).

Almost surely, 2^23155553 is an apocalyptic number.

It is an amenable number.

23155553 is a deficient number, since it is larger than the sum of its proper divisors (392527).

23155553 is an equidigital number, since it uses as much as digits as its factorization.

23155553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392526.

The product of its digits is 11250, while the sum is 29.

The square root of 23155553 is about 4812.0217164930. The cubic root of 23155553 is about 285.0263769575.

The spelling of 23155553 in words is "twenty-three million, one hundred fifty-five thousand, five hundred fifty-three".