2145213882 has 80 divisors (see below), whose sum is σ = 5504845632. Its totient is φ = 611660160.

The previous prime is 2145213881. The next prime is 2145213893. The reversal of 2145213882 is 2883125412.

It is a happy number.

2145213882 is a `hidden beast` number, since 21 + 4 + 521 + 38 + 82 = 666.

It is not an unprimeable number, because it can be changed into a prime (2145213881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 645858 + ... + 649170.

Almost surely, 2^2145213882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2145213882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2752422816).

2145213882 is an abundant number, since it is smaller than the sum of its proper divisors (3359631750).

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

2145213882 is a wasteful number, since it uses less digits than its factorization.

2145213882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3905 (or 3896 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 2145213882 is about 46316.4536854885. The cubic root of 2145213882 is about 1289.7044536567.

The spelling of 2145213882 in words is "two billion, one hundred forty-five million, two hundred thirteen thousand, eight hundred eighty-two".