8132211945 has 128 divisors (see below), whose sum is σ = 17879500800. Its totient is φ = 3447878400.

The previous prime is 8132211943. The next prime is 8132211947. The reversal of 8132211945 is 5491122318.

It is an interprime number because it is at equal distance from previous prime (8132211943) and next prime (8132211947).

It is not a de Polignac number, because 8132211945 - 2¹ = 8132211943 is a prime.

It is a super-2 number, since 2×8132211945² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8132211943) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 355710 + ... + 377880.

It is an arithmetic number, because the mean of its divisors is an integer number (139683600).

Almost surely, 2^8132211945 is an apocalyptic number.

It is an amenable number.

8132211945 is an abundant number, since it is smaller than the sum of its proper divisors (9747288855).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8132211945 is a wasteful number, since it uses less digits than its factorization.

8132211945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22228 (or 22222 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 8132211945 is about 90178.7776863271. Note that the first 3 decimals coincide. The cubic root of 8132211945 is about 2010.9575188372.

The spelling of 8132211945 in words is "eight billion, one hundred thirty-two million, two hundred eleven thousand, nine hundred forty-five".