21041432231 has 8 divisors (see below), whose sum is σ = 21099886080. Its totient is φ = 20983057848.

The previous prime is 21041432213. The next prime is 21041432239. The reversal of 21041432231 is 13223414012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21041432231 - 2²² = 21037237927 is a prime.

It is a super-2 number, since 2×21041432231² (a number of 21 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 = 21041432197 and 21041432206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041432239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531440 + ... + 569658.

It is an arithmetic number, because the mean of its divisors is an integer number (2637485760).

Almost surely, 2^21041432231 is an apocalyptic number.

21041432231 is a deficient number, since it is larger than the sum of its proper divisors (58453849).

21041432231 is an equidigital number, since it uses as much as digits as its factorization.

21041432231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39733.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21041432231 its reverse (13223414012), we get a palindrome (34264846243).

The spelling of 21041432231 in words is "twenty-one billion, forty-one million, four hundred thirty-two thousand, two hundred thirty-one".