23578487531 has 4 divisors (see below), whose sum is σ = 23582399232. Its totient is φ = 23574575832.

The previous prime is 23578487489. The next prime is 23578487533. The reversal of 23578487531 is 13578487532.

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 23578487531 - 2¹⁰ = 23578486507 is a prime.

It is a super-3 number, since 3×23578487531³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23578487533) 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, 1946795 + ... + 1958868.

It is an arithmetic number, because the mean of its divisors is an integer number (5895599808).

Almost surely, 2^23578487531 is an apocalyptic number.

23578487531 is a deficient number, since it is larger than the sum of its proper divisors (3911701).

23578487531 is an equidigital number, since it uses as much as digits as its factorization.

23578487531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3911700.

The product of its digits is 5644800, while the sum is 53.

Subtracting from 23578487531 its reverse (13578487532), we obtain a palindrome (9999999999).

The spelling of 23578487531 in words is "twenty-three billion, five hundred seventy-eight million, four hundred eighty-seven thousand, five hundred thirty-one".