23505041531 has 4 divisors (see below), whose sum is σ = 24742149000. Its totient is φ = 22267934064.

The previous prime is 23505041503. The next prime is 23505041537. The reversal of 23505041531 is 13514050532.

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 23505041531 - 2¹⁴ = 23505025147 is a prime.

It is a super-2 number, since 2×23505041531² (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 = 23505041494 and 23505041503.

It is not an unprimeable number, because it can be changed into a prime (23505041537) 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, 618553706 + ... + 618553743.

It is an arithmetic number, because the mean of its divisors is an integer number (6185537250).

Almost surely, 2^23505041531 is an apocalyptic number.

23505041531 is a deficient number, since it is larger than the sum of its proper divisors (1237107469).

23505041531 is a wasteful number, since it uses less digits than its factorization.

23505041531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237107468.

The product of its (nonzero) digits is 9000, while the sum is 29.

Subtracting from 23505041531 its reverse (13514050532), we obtain a palindrome (9990990999).

The spelling of 23505041531 in words is "twenty-three billion, five hundred five million, forty-one thousand, five hundred thirty-one".