221030296 has 8 divisors (see below), whose sum is σ = 414431820. Its totient is φ = 110515144.

The previous prime is 221030291. The next prime is 221030297. The reversal of 221030296 is 692030122.

It is a happy number.

221030296 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 221030296.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221030291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13814386 + ... + 13814401.

Almost surely, 2^221030296 is an apocalyptic number.

It is an amenable number.

221030296 is a deficient number, since it is larger than the sum of its proper divisors (193401524).

221030296 is a wasteful number, since it uses less digits than its factorization.

221030296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27628793 (or 27628789 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 221030296 is about 14867.0876771478. The cubic root of 221030296 is about 604.6219854742.

The spelling of 221030296 in words is "two hundred twenty-one million, thirty thousand, two hundred ninety-six".