716494221 has 16 divisors (see below), whose sum is σ = 1062227520. Its totient is φ = 477323280.

The previous prime is 716494211. The next prime is 716494267. The reversal of 716494221 is 122494617.

It is a happy number.

716494221 is a `hidden beast` number, since 7 + 1 + 649 + 4 + 2 + 2 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-716494221 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716494211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32671 + ... + 50003.

It is an arithmetic number, because the mean of its divisors is an integer number (66389220).

Almost surely, 2^716494221 is an apocalyptic number.

It is an amenable number.

716494221 is a deficient number, since it is larger than the sum of its proper divisors (345733299).

716494221 is a wasteful number, since it uses less digits than its factorization.

716494221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18873 (or 18867 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 716494221 is about 26767.4096804304. The cubic root of 716494221 is about 894.8238767905.

The spelling of 716494221 in words is "seven hundred sixteen million, four hundred ninety-four thousand, two hundred twenty-one".