21531422331140 has 48 divisors (see below), whose sum is σ = 45387277824000. Its totient is φ = 8579987517312.

The previous prime is 21531422331137. The next prime is 21531422331169. The reversal of 21531422331140 is 4113322413512.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21531422331097 and 21531422331106.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6168341 + ... + 9006179.

It is an arithmetic number, because the mean of its divisors is an integer number (945568288000).

Almost surely, 2^{21531422331140} is an apocalyptic number.

21531422331140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21531422331140 is an abundant number, since it is smaller than the sum of its proper divisors (23855855492860).

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

21531422331140 is a wasteful number, since it uses less digits than its factorization.

21531422331140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2839284 (or 2839282 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 21531422331140 its reverse (4113322413512), we get a palindrome (25644744744652).

The spelling of 21531422331140 in words is "twenty-one trillion, five hundred thirty-one billion, four hundred twenty-two million, three hundred thirty-one thousand, one hundred forty".