716633221 has 4 divisors (see below), whose sum is σ = 716688000. Its totient is φ = 716578444.

The previous prime is 716633201. The next prime is 716633243. The reversal of 716633221 is 122336617.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 122336617 = 13 ⋅9410509.

It is a cyclic number.

It is not a de Polignac number, because 716633221 - 2¹¹ = 716631173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716633201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5010 + ... + 38188.

It is an arithmetic number, because the mean of its divisors is an integer number (179172000).

Almost surely, 2^716633221 is an apocalyptic number.

It is an amenable number.

716633221 is a deficient number, since it is larger than the sum of its proper divisors (54779).

716633221 is a wasteful number, since it uses less digits than its factorization.

716633221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54778.

The product of its digits is 9072, while the sum is 31.

The square root of 716633221 is about 26770.0059955167. The cubic root of 716633221 is about 894.8817383768.

Adding to 716633221 its reverse (122336617), we get a palindrome (838969838).

The spelling of 716633221 in words is "seven hundred sixteen million, six hundred thirty-three thousand, two hundred twenty-one".