23551011305 has 4 divisors (see below), whose sum is σ = 28261213572. Its totient is φ = 18840809040.

The previous prime is 23551011283. The next prime is 23551011311. The reversal of 23551011305 is 50311015532.

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 7186461529 + 16364549776 = 84773^2 + 127924^2 .

It is not a de Polignac number, because 23551011305 - 2⁶ = 23551011241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2355101126 + ... + 2355101135.

It is an arithmetic number, because the mean of its divisors is an integer number (7065303393).

Almost surely, 2^23551011305 is an apocalyptic number.

It is an amenable number.

23551011305 is a deficient number, since it is larger than the sum of its proper divisors (4710202267).

23551011305 is an equidigital number, since it uses as much as digits as its factorization.

23551011305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4710202266.

The product of its (nonzero) digits is 2250, while the sum is 26.

Adding to 23551011305 its reverse (50311015532), we get a palindrome (73862026837).

The spelling of 23551011305 in words is "twenty-three billion, five hundred fifty-one million, eleven thousand, three hundred five".