21433131331 has 8 divisors (see below), whose sum is σ = 21646404000. Its totient is φ = 21220784640.

The previous prime is 21433131329. The next prime is 21433131353. The reversal of 21433131331 is 13313133412.

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 21433131331 - 2¹ = 21433131329 is a prime.

It is a super-2 number, since 2×21433131331² (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 = 21433131296 and 21433131305.

It is not an unprimeable number, because it can be changed into a prime (21433131631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184926 + ... + 277603.

It is an arithmetic number, because the mean of its divisors is an integer number (2705800500).

Almost surely, 2^21433131331 is an apocalyptic number.

21433131331 is a deficient number, since it is larger than the sum of its proper divisors (213272669).

21433131331 is a wasteful number, since it uses less digits than its factorization.

21433131331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462989.

The product of its digits is 1944, while the sum is 25.

Adding to 21433131331 its reverse (13313133412), we get a palindrome (34746264743).

The spelling of 21433131331 in words is "twenty-one billion, four hundred thirty-three million, one hundred thirty-one thousand, three hundred thirty-one".