8219210845 has 16 divisors (see below), whose sum is σ = 9897048000. Its totient is φ = 6552741888.

The previous prime is 8219210819. The next prime is 8219210897. The reversal of 8219210845 is 5480129128.

It is a cyclic number.

It is not a de Polignac number, because 8219210845 - 2¹⁹ = 8218686557 is a prime.

It is a super-2 number, since 2×8219210845² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8219210798 and 8219210807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3055261 + ... + 3057949.

It is an arithmetic number, because the mean of its divisors is an integer number (618565500).

Almost surely, 2^8219210845 is an apocalyptic number.

It is an amenable number.

8219210845 is a deficient number, since it is larger than the sum of its proper divisors (1677837155).

8219210845 is a wasteful number, since it uses less digits than its factorization.

8219210845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4572.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 8219210845 is about 90659.8634733144. The cubic root of 8219210845 is about 2018.1032128506.

The spelling of 8219210845 in words is "eight billion, two hundred nineteen million, two hundred ten thousand, eight hundred forty-five".