7725226217 has 4 divisors (see below), whose sum is σ = 7725420420. Its totient is φ = 7725032016.

The previous prime is 7725226211. The next prime is 7725226297. The reversal of 7725226217 is 7126225277.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2445895936 + 5279330281 = 49456^2 + 72659^2 .

It is a cyclic number.

It is not a de Polignac number, because 7725226217 - 2⁸ = 7725225961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7725226211) 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, 13358 + ... + 125015.

It is an arithmetic number, because the mean of its divisors is an integer number (1931355105).

Almost surely, 2^7725226217 is an apocalyptic number.

It is an amenable number.

7725226217 is a deficient number, since it is larger than the sum of its proper divisors (194203).

7725226217 is a wasteful number, since it uses less digits than its factorization.

7725226217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194202.

The product of its digits is 164640, while the sum is 41.

The square root of 7725226217 is about 87893.2660503636. The cubic root of 7725226217 is about 1976.8349099586.

The spelling of 7725226217 in words is "seven billion, seven hundred twenty-five million, two hundred twenty-six thousand, two hundred seventeen".