21751283322 has 72 divisors (see below), whose sum is σ = 49338840096. Its totient is φ = 7182003024.

The previous prime is 21751283317. The next prime is 21751283327. The reversal of 21751283322 is 22338215712.

21751283322 is a `hidden beast` number, since 2 + 1 + 7 + 51 + 283 + 322 = 666.

It is an interprime number because it is at equal distance from previous prime (21751283317) and next prime (21751283327).

It is not an unprimeable number, because it can be changed into a prime (21751283327) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5772283 + ... + 5776049.

It is an arithmetic number, because the mean of its divisors is an integer number (685261668).

Almost surely, 2^21751283322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21751283322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24669420048).

21751283322 is an abundant number, since it is smaller than the sum of its proper divisors (27587556774).

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

21751283322 is an equidigital number, since it uses as much as digits as its factorization.

21751283322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002 (or 3881 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The spelling of 21751283322 in words is "twenty-one billion, seven hundred fifty-one million, two hundred eighty-three thousand, three hundred twenty-two".