7215145605 has 32 divisors (see below), whose sum is σ = 12837657600. Its totient is φ = 3844858176.

The previous prime is 7215145591. The next prime is 7215145631. The reversal of 7215145605 is 5065415127.

7215145605 is a `hidden beast` number, since 7 + 2 + 1 + 5 + 1 + 45 + 605 = 666.

It is not a de Polignac number, because 7215145605 - 2⁶ = 7215145541 is a prime.

It is a super-2 number, since 2×7215145605² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7215145605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144172 + ... + 187658.

It is an arithmetic number, because the mean of its divisors is an integer number (401176800).

Almost surely, 2^7215145605 is an apocalyptic number.

It is an amenable number.

7215145605 is a deficient number, since it is larger than the sum of its proper divisors (5622511995).

7215145605 is a wasteful number, since it uses less digits than its factorization.

7215145605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44730 (or 44724 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 7215145605 is about 84942.0131913531. The cubic root of 7215145605 is about 1932.3317950851.

The spelling of 7215145605 in words is "seven billion, two hundred fifteen million, one hundred forty-five thousand, six hundred five".