23042005531 has 4 divisors (see below), whose sum is σ = 23785296064. Its totient is φ = 22298715000.

The previous prime is 23042005471. The next prime is 23042005537. The reversal of 23042005531 is 13550024032.

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 23042005531 - 2¹¹ = 23042003483 is a prime.

It is a super-2 number, since 2×23042005531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23042005496 and 23042005505.

It is not an unprimeable number, because it can be changed into a prime (23042005537) 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, 371645220 + ... + 371645281.

It is an arithmetic number, because the mean of its divisors is an integer number (5946324016).

Almost surely, 2^23042005531 is an apocalyptic number.

23042005531 is a deficient number, since it is larger than the sum of its proper divisors (743290533).

23042005531 is an equidigital number, since it uses as much as digits as its factorization.

23042005531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743290532.

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 23042005531 its reverse (13550024032), we get a palindrome (36592029563).

The spelling of 23042005531 in words is "twenty-three billion, forty-two million, five thousand, five hundred thirty-one".