2685934221 has 12 divisors (see below), whose sum is σ = 3779654112. Its totient is φ = 1696378824.

The previous prime is 2685934219. The next prime is 2685934283. The reversal of 2685934221 is 1224395862.

It is not a de Polignac number, because 2685934221 - 2¹ = 2685934219 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2685934211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1238961 + ... + 1241126.

It is an arithmetic number, because the mean of its divisors is an integer number (314971176).

Almost surely, 2^2685934221 is an apocalyptic number.

It is an amenable number.

2685934221 is a deficient number, since it is larger than the sum of its proper divisors (1093719891).

2685934221 is a wasteful number, since it uses less digits than its factorization.

2685934221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480128 (or 2480109 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 2685934221 is about 51825.9994693783. Note that the first 3 decimals coincide. The cubic root of 2685934221 is about 1390.0543810134.

The spelling of 2685934221 in words is "two billion, six hundred eighty-five million, nine hundred thirty-four thousand, two hundred twenty-one".