2172238836 has 24 divisors (see below), whose sum is σ = 5073126240. Its totient is φ = 723426912.

The previous prime is 2172238807. The next prime is 2172238847. The reversal of 2172238836 is 6388322712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67626 + ... + 94433.

It is an arithmetic number, because the mean of its divisors is an integer number (211380260).

Almost surely, 2^2172238836 is an apocalyptic number.

It is an amenable number.

2172238836 is an abundant number, since it is smaller than the sum of its proper divisors (2900887404).

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

2172238836 is a wasteful number, since it uses less digits than its factorization.

2172238836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163183 (or 163181 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 2172238836 is about 46607.2830789352. The cubic root of 2172238836 is about 1295.0976777195.

The spelling of 2172238836 in words is "two billion, one hundred seventy-two million, two hundred thirty-eight thousand, eight hundred thirty-six".