23120505 has 16 divisors (see below), whose sum is σ = 41103360. Its totient is φ = 12330864.

The previous prime is 23120501. The next prime is 23120551. The reversal of 23120505 is 50502132.

It is a happy number.

It is not a de Polignac number, because 23120505 - 2² = 23120501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23120501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85497 + ... + 85766.

It is an arithmetic number, because the mean of its divisors is an integer number (2568960).

Almost surely, 2^23120505 is an apocalyptic number.

It is an amenable number.

23120505 is a deficient number, since it is larger than the sum of its proper divisors (17982855).

23120505 is a wasteful number, since it uses less digits than its factorization.

23120505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171277 (or 171271 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 23120505 is about 4808.3786248589. The cubic root of 23120505 is about 284.8825000402.

Adding to 23120505 its reverse (50502132), we get a palindrome (73622637).

It can be divided in two parts, 231 and 20505, that added together give a 4-th power (20736 = 12⁴).

The spelling of 23120505 in words is "twenty-three million, one hundred twenty thousand, five hundred five".