8221512489 has 4 divisors (see below), whose sum is σ = 10962016656. Its totient is φ = 5481008324.

The previous prime is 8221512421. The next prime is 8221512493. The reversal of 8221512489 is 9842151228.

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 8221512489 - 2¹⁷ = 8221381417 is a prime.

It is a super-3 number, since 3×8221512489³ (a number of 31 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8221512489.

It is not an unprimeable number, because it can be changed into a prime (8221512419) 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, 1370252079 + ... + 1370252084.

It is an arithmetic number, because the mean of its divisors is an integer number (2740504164).

Almost surely, 2^8221512489 is an apocalyptic number.

It is an amenable number.

8221512489 is a deficient number, since it is larger than the sum of its proper divisors (2740504167).

8221512489 is a wasteful number, since it uses less digits than its factorization.

8221512489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740504166.

The product of its digits is 92160, while the sum is 42.

The square root of 8221512489 is about 90672.5564269586. The cubic root of 8221512489 is about 2018.2915732552.

It can be divided in two parts, 8221 and 512489, that added together give a triangular number (520710 = T₁₀₂₀).

The spelling of 8221512489 in words is "eight billion, two hundred twenty-one million, five hundred twelve thousand, four hundred eighty-nine".