7215975625 has 10 divisors (see below), whose sum is σ = 9017083922. Its totient is φ = 5772780000.

The previous prime is 7215975623. The next prime is 7215975673. The reversal of 7215975625 is 5265795127.

It can be written as a sum of positive squares in 5 ways, for example, as 2872638409 + 4343337216 = 53597^2 + 65904^2 .

It is not a de Polignac number, because 7215975625 - 2¹ = 7215975623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7215975623) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5772156 + ... + 5773405.

Almost surely, 2^7215975625 is an apocalyptic number.

It is an amenable number.

7215975625 is a deficient number, since it is larger than the sum of its proper divisors (1801108297).

7215975625 is an equidigital number, since it uses as much as digits as its factorization.

7215975625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11545581 (or 11545566 counting only the distinct ones).

The product of its digits is 1323000, while the sum is 49.

The square root of 7215975625 is about 84946.8988545197. The cubic root of 7215975625 is about 1932.4058898032.

The spelling of 7215975625 in words is "seven billion, two hundred fifteen million, nine hundred seventy-five thousand, six hundred twenty-five".