221335396 has 6 divisors (see below), whose sum is σ = 387336950. Its totient is φ = 110667696.

The previous prime is 221335391. The next prime is 221335421. The reversal of 221335396 is 693533122.

221335396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 220938496 + 396900 = 14864^2 + 630^2 .

It is not an unprimeable number, because it can be changed into a prime (221335391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27666921 + ... + 27666928.

Almost surely, 2^221335396 is an apocalyptic number.

It is an amenable number.

221335396 is a deficient number, since it is larger than the sum of its proper divisors (166001554).

221335396 is a wasteful number, since it uses less digits than its factorization.

221335396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55333853 (or 55333851 counting only the distinct ones).

The product of its digits is 29160, while the sum is 34.

The square root of 221335396 is about 14877.3450588470. The cubic root of 221335396 is about 604.9000549789.

The spelling of 221335396 in words is "two hundred twenty-one million, three hundred thirty-five thousand, three hundred ninety-six".