23153545 has 4 divisors (see below), whose sum is σ = 27784260. Its totient is φ = 18522832.

The previous prime is 23153539. The next prime is 23153551. The reversal of 23153545 is 54535132.

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

It is an interprime number because it is at equal distance from previous prime (23153539) and next prime (23153551).

It can be written as a sum of positive squares in 2 ways, for example, as 6245001 + 16908544 = 2499^2 + 4112^2 .

It is a cyclic number.

It is not a de Polignac number, because 23153545 - 2⁹ = 23153033 is a prime.

It is an unprimeable number.

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, 2315350 + ... + 2315359.

It is an arithmetic number, because the mean of its divisors is an integer number (6946065).

Almost surely, 2^23153545 is an apocalyptic number.

It is an amenable number.

23153545 is a deficient number, since it is larger than the sum of its proper divisors (4630715).

23153545 is an equidigital number, since it uses as much as digits as its factorization.

23153545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4630714.

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

The square root of 23153545 is about 4811.8130678571. The cubic root of 23153545 is about 285.0181377602.

Adding to 23153545 its reverse (54535132), we get a palindrome (77688677).

The spelling of 23153545 in words is "twenty-three million, one hundred fifty-three thousand, five hundred forty-five".