822921601 has 4 divisors (see below), whose sum is σ = 871328772. Its totient is φ = 774514432.

The previous prime is 822921587. The next prime is 822921607. The reversal of 822921601 is 106129228.

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 293231376 + 529690225 = 17124^2 + 23015^2 .

It is a cyclic number.

It is not a de Polignac number, because 822921601 - 2¹³ = 822913409 is a prime.

It is a super-3 number, since 3×822921601³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (822921607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24203560 + ... + 24203593.

It is an arithmetic number, because the mean of its divisors is an integer number (217832193).

Almost surely, 2^822921601 is an apocalyptic number.

It is an amenable number.

822921601 is a deficient number, since it is larger than the sum of its proper divisors (48407171).

822921601 is a wasteful number, since it uses less digits than its factorization.

822921601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48407170.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 822921601 is about 28686.6101343467. The cubic root of 822921601 is about 937.1004665791.

The spelling of 822921601 in words is "eight hundred twenty-two million, nine hundred twenty-one thousand, six hundred one".