7215606505 has 4 divisors (see below), whose sum is σ = 8658727812. Its totient is φ = 5772485200.

The previous prime is 7215606499. The next prime is 7215606509. The reversal of 7215606505 is 5056065127.

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 1497070864 + 5718535641 = 38692^2 + 75621^2 .

It is not a de Polignac number, because 7215606505 - 2⁹ = 7215605993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7215606509) 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, 721560646 + ... + 721560655.

It is an arithmetic number, because the mean of its divisors is an integer number (2164681953).

Almost surely, 2^7215606505 is an apocalyptic number.

It is an amenable number.

7215606505 is a deficient number, since it is larger than the sum of its proper divisors (1443121307).

7215606505 is a wasteful number, since it uses less digits than its factorization.

7215606505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443121306.

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 7215606505 is about 84944.7261753194. The cubic root of 7215606505 is about 1932.3729396815.

It can be divided in two parts, 7 and 215606505, that added together give a palindrome (215606512).

The spelling of 7215606505 in words is "seven billion, two hundred fifteen million, six hundred six thousand, five hundred five".