23051605 has 4 divisors (see below), whose sum is σ = 27661932. Its totient is φ = 18441280.

The previous prime is 23051603. The next prime is 23051653. The reversal of 23051605 is 50615032.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7107556 + 15944049 = 2666^2 + 3993^2 .

It is not a de Polignac number, because 23051605 - 2¹ = 23051603 is a prime.

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 (23051603) 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, 2305156 + ... + 2305165.

It is an arithmetic number, because the mean of its divisors is an integer number (6915483).

Almost surely, 2^23051605 is an apocalyptic number.

It is an amenable number.

23051605 is a deficient number, since it is larger than the sum of its proper divisors (4610327).

23051605 is an equidigital number, since it uses as much as digits as its factorization.

23051605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4610326.

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

The square root of 23051605 is about 4801.2087019833. The cubic root of 23051605 is about 284.5992315101.

Adding to 23051605 its reverse (50615032), we get a palindrome (73666637).

The spelling of 23051605 in words is "twenty-three million, fifty-one thousand, six hundred five".