2187213192 has 40 divisors (see below), whose sum is σ = 6126223950. Its totient is φ = 729070848.

The previous prime is 2187213187. The next prime is 2187213257. The reversal of 2187213192 is 2913127812.

It can be written as a sum of positive squares in only one way, i.e., 1694639556 + 492573636 = 41166^2 + 22194^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1687017 + ... + 1688312.

Almost surely, 2^2187213192 is an apocalyptic number.

It is an amenable number.

2187213192 is an abundant number, since it is smaller than the sum of its proper divisors (3939010758).

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

2187213192 is a wasteful number, since it uses less digits than its factorization.

2187213192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375347 (or 3375334 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 2187213192 is about 46767.6511276758. The cubic root of 2187213192 is about 1298.0667896937.

The spelling of 2187213192 in words is "two billion, one hundred eighty-seven million, two hundred thirteen thousand, one hundred ninety-two".