869222521 has 4 divisors (see below), whose sum is σ = 869446912. Its totient is φ = 868998132.

The previous prime is 869222513. The next prime is 869222527. The reversal of 869222521 is 125222968.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 869222521 - 2³ = 869222513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869222527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106281 + ... + 114166.

It is an arithmetic number, because the mean of its divisors is an integer number (217361728).

Almost surely, 2^869222521 is an apocalyptic number.

It is an amenable number.

869222521 is a deficient number, since it is larger than the sum of its proper divisors (224391).

869222521 is a wasteful number, since it uses less digits than its factorization.

869222521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224390.

The product of its digits is 34560, while the sum is 37.

The square root of 869222521 is about 29482.5799583415. The cubic root of 869222521 is about 954.3558134774.

It can be divided in two parts, 8692 and 22521, that added together give a palindrome (31213).

The spelling of 869222521 in words is "eight hundred sixty-nine million, two hundred twenty-two thousand, five hundred twenty-one".