7216523653 has 4 divisors (see below), whose sum is σ = 7230375468. Its totient is φ = 7202671840.

The previous prime is 7216523641. The next prime is 7216523663. The reversal of 7216523653 is 3563256127.

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 2223405409 + 4993118244 = 47153^2 + 70662^2 .

It is a cyclic number.

It is not a de Polignac number, because 7216523653 - 2⁵ = 7216523621 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (7216523663) 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, 6925126 + ... + 6926167.

It is an arithmetic number, because the mean of its divisors is an integer number (1807593867).

Almost surely, 2^7216523653 is an apocalyptic number.

It is an amenable number.

7216523653 is a deficient number, since it is larger than the sum of its proper divisors (13851815).

7216523653 is a wasteful number, since it uses less digits than its factorization.

7216523653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13851814.

The product of its digits is 226800, while the sum is 40.

The square root of 7216523653 is about 84950.1245025574. The cubic root of 7216523653 is about 1932.4548083778.

The spelling of 7216523653 in words is "seven billion, two hundred sixteen million, five hundred twenty-three thousand, six hundred fifty-three".