822532981 has 4 divisors (see below), whose sum is σ = 870917292. Its totient is φ = 774148672.

The previous prime is 822532979. The next prime is 822532987. The reversal of 822532981 is 189235228.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 392634225 + 429898756 = 19815^2 + 20734^2 .

It is a cyclic number.

It is not a de Polignac number, because 822532981 - 2¹ = 822532979 is a prime.

It is a super-2 number, since 2×822532981² = 1353121009665492722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822532987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24192130 + ... + 24192163.

It is an arithmetic number, because the mean of its divisors is an integer number (217729323).

Almost surely, 2^822532981 is an apocalyptic number.

It is an amenable number.

822532981 is a deficient number, since it is larger than the sum of its proper divisors (48384311).

822532981 is a wasteful number, since it uses less digits than its factorization.

822532981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48384310.

The product of its digits is 69120, while the sum is 40.

The square root of 822532981 is about 28679.8357910222. The cubic root of 822532981 is about 936.9529299144.

The spelling of 822532981 in words is "eight hundred twenty-two million, five hundred thirty-two thousand, nine hundred eighty-one".