21231041532 has 96 divisors (see below), whose sum is σ = 53274521664. Its totient is φ = 6557184000.

The previous prime is 21231041527. The next prime is 21231041537. The reversal of 21231041532 is 23514013212.

It is an interprime number because it is at equal distance from previous prime (21231041527) and next prime (21231041537).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231041537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3726478 + ... + 3732170.

It is an arithmetic number, because the mean of its divisors is an integer number (554942934).

Almost surely, 2^21231041532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21231041532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26637260832).

21231041532 is an abundant number, since it is smaller than the sum of its proper divisors (32043480132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21231041532 is a wasteful number, since it uses less digits than its factorization.

21231041532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5999 (or 5997 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 21231041532 its reverse (23514013212), we get a palindrome (44745054744).

The spelling of 21231041532 in words is "twenty-one billion, two hundred thirty-one million, forty-one thousand, five hundred thirty-two".