7225115250521 has 4 divisors (see below), whose sum is σ = 8257274572032. Its totient is φ = 6192955929012.

The previous prime is 7225115250491. The next prime is 7225115250523. The reversal of 7225115250521 is 1250525115227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7225115250521 - 2¹⁰ = 7225115249497 is a prime.

It is a super-2 number, since 2×7225115250521² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7225115250523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516079660745 + ... + 516079660758.

It is an arithmetic number, because the mean of its divisors is an integer number (2064318643008).

Almost surely, 2^{7225115250521} is an apocalyptic number.

It is an amenable number.

7225115250521 is a deficient number, since it is larger than the sum of its proper divisors (1032159321511).

7225115250521 is a wasteful number, since it uses less digits than its factorization.

7225115250521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032159321510.

The product of its (nonzero) digits is 70000, while the sum is 38.

The spelling of 7225115250521 in words is "seven trillion, two hundred twenty-five billion, one hundred fifteen million, two hundred fifty thousand, five hundred twenty-one".