23311213543 has 4 divisors (see below), whose sum is σ = 23321382088. Its totient is φ = 23301045000.

The previous prime is 23311213511. The next prime is 23311213567. The reversal of 23311213543 is 34531211332.

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

It is a cyclic number.

It is not a de Polignac number, because 23311213543 - 2⁵ = 23311213511 is a prime.

It is a super-2 number, since 2×23311213543² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311213573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5080833 + ... + 5085418.

It is an arithmetic number, because the mean of its divisors is an integer number (5830345522).

Almost surely, 2^23311213543 is an apocalyptic number.

23311213543 is a deficient number, since it is larger than the sum of its proper divisors (10168545).

23311213543 is a wasteful number, since it uses less digits than its factorization.

23311213543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10168544.

The product of its digits is 6480, while the sum is 28.

Adding to 23311213543 its reverse (34531211332), we get a palindrome (57842424875).

The spelling of 23311213543 in words is "twenty-three billion, three hundred eleven million, two hundred thirteen thousand, five hundred forty-three".