23221687539 has 32 divisors (see below), whose sum is σ = 32831399680. Its totient is φ = 14558942592.

The previous prime is 23221687513. The next prime is 23221687571. The reversal of 23221687539 is 93578612232.

It is not a de Polignac number, because 23221687539 - 2¹¹ = 23221685491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23221687039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4465689 + ... + 4470885.

It is an arithmetic number, because the mean of its divisors is an integer number (1025981240).

Almost surely, 2^23221687539 is an apocalyptic number.

23221687539 is a deficient number, since it is larger than the sum of its proper divisors (9609712141).

23221687539 is a wasteful number, since it uses less digits than its factorization.

23221687539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5779.

The product of its digits is 1088640, while the sum is 48.

It can be divided in two parts, 2322 and 1687539, that added together give a palindrome (1689861).

The spelling of 23221687539 in words is "twenty-three billion, two hundred twenty-one million, six hundred eighty-seven thousand, five hundred thirty-nine".