822101540 has 48 divisors (see below), whose sum is σ = 1871780400. Its totient is φ = 301493760.

The previous prime is 822101509. The next prime is 822101543. The reversal of 822101540 is 45101228.

It can be written as a sum of positive squares in 8 ways, for example, as 28665316 + 793436224 = 5354^2 + 28168^2 .

It is not an unprimeable number, because it can be changed into a prime (822101543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28130 + ... + 49350.

It is an arithmetic number, because the mean of its divisors is an integer number (38995425).

Almost surely, 2^822101540 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 822101540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (935890200).

822101540 is an abundant number, since it is smaller than the sum of its proper divisors (1049678860).

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

822101540 is a wasteful number, since it uses less digits than its factorization.

822101540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21392 (or 21390 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 822101540 is about 28672.3131260804. The cubic root of 822101540 is about 936.7890821347.

Adding to 822101540 its reverse (45101228), we get a palindrome (867202768).

The spelling of 822101540 in words is "eight hundred twenty-two million, one hundred one thousand, five hundred forty".