6936221 has 8 divisors (see below), whose sum is σ = 7379064. Its totient is φ = 6497280.

The previous prime is 6936211. The next prime is 6936247. The reversal of 6936221 is 1226396.

It can be written as a sum of positive squares in 4 ways, for example, as 2292196 + 4644025 = 1514^2 + 2155^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6936221 - 2¹⁰ = 6935197 is a prime.

It is a super-2 number, since 2×6936221² = 96222323521682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6936211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3251 + ... + 4943.

It is an arithmetic number, because the mean of its divisors is an integer number (922383).

Almost surely, 2^6936221 is an apocalyptic number.

It is an amenable number.

6936221 is a deficient number, since it is larger than the sum of its proper divisors (442843).

6936221 is a wasteful number, since it uses less digits than its factorization.

6936221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951.

The product of its digits is 3888, while the sum is 29.

The square root of 6936221 is about 2633.6706324064. The cubic root of 6936221 is about 190.7103693949.

The spelling of 6936221 in words is "six million, nine hundred thirty-six thousand, two hundred twenty-one".