23001655 has 4 divisors (see below), whose sum is σ = 27601992. Its totient is φ = 18401320.

The previous prime is 23001653. The next prime is 23001677. The reversal of 23001655 is 55610032.

It is a happy number.

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

It is not a de Polignac number, because 23001655 - 2¹ = 23001653 is a prime.

It is a super-2 number, since 2×23001655² = 1058152265478050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23001653) by changing a digit.

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, 2300161 + ... + 2300170.

It is an arithmetic number, because the mean of its divisors is an integer number (6900498).

Almost surely, 2^23001655 is an apocalyptic number.

23001655 is a deficient number, since it is larger than the sum of its proper divisors (4600337).

23001655 is an equidigital number, since it uses as much as digits as its factorization.

23001655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600336.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 23001655 is about 4796.0040658865. The cubic root of 23001655 is about 284.3935189808.

Adding to 23001655 its reverse (55610032), we get a palindrome (78611687).

The spelling of 23001655 in words is "twenty-three million, one thousand, six hundred fifty-five".