7745223217 has 4 divisors (see below), whose sum is σ = 7745875056. Its totient is φ = 7744571380.

The previous prime is 7745223197. The next prime is 7745223223. The reversal of 7745223217 is 7123225477.

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.

It is a cyclic number.

It is not a de Polignac number, because 7745223217 - 2¹⁵ = 7745190449 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7745223217.

It is not an unprimeable number, because it can be changed into a prime (7745223247) 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, 307759 + ... + 331972.

It is an arithmetic number, because the mean of its divisors is an integer number (1936468764).

Almost surely, 2^7745223217 is an apocalyptic number.

It is an amenable number.

7745223217 is a deficient number, since it is larger than the sum of its proper divisors (651839).

7745223217 is a wasteful number, since it uses less digits than its factorization.

7745223217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651838.

The product of its digits is 164640, while the sum is 40.

The square root of 7745223217 is about 88006.9498221589. The cubic root of 7745223217 is about 1978.5391408621.

The spelling of 7745223217 in words is "seven billion, seven hundred forty-five million, two hundred twenty-three thousand, two hundred seventeen".