7212272185 has 8 divisors (see below), whose sum is σ = 9163828296. Its totient is φ = 5430416640.

The previous prime is 7212272161. The next prime is 7212272201. The reversal of 7212272185 is 5812722127.

It can be written as a sum of positive squares in 4 ways, for example, as 1922910201 + 5289361984 = 43851^2 + 72728^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7212272185 - 2⁹ = 7212271673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42425046 + ... + 42425215.

It is an arithmetic number, because the mean of its divisors is an integer number (1145478537).

Almost surely, 2^7212272185 is an apocalyptic number.

It is an amenable number.

7212272185 is a deficient number, since it is larger than the sum of its proper divisors (1951556111).

7212272185 is a wasteful number, since it uses less digits than its factorization.

7212272185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84850283.

The product of its digits is 31360, while the sum is 37.

The square root of 7212272185 is about 84925.0974977362. The cubic root of 7212272185 is about 1932.0752450272.

The spelling of 7212272185 in words is "seven billion, two hundred twelve million, two hundred seventy-two thousand, one hundred eighty-five".