7250220528 has 40 divisors (see below), whose sum is σ = 18940194000. Its totient is φ = 2389584384.

The previous prime is 7250220499. The next prime is 7250220557. The reversal of 7250220528 is 8250220527.

It is an interprime number because it is at equal distance from previous prime (7250220499) and next prime (7250220557).

It is a super-3 number, since 3×7250220528³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 844303 + ... + 852846.

It is an arithmetic number, because the mean of its divisors is an integer number (473504850).

Almost surely, 2^7250220528 is an apocalyptic number.

It is an amenable number.

7250220528 is an abundant number, since it is smaller than the sum of its proper divisors (11689973472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7250220528 is a wasteful number, since it uses less digits than its factorization.

7250220528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697249 (or 1697243 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 7250220528 is about 85148.2268047902. The cubic root of 7250220528 is about 1935.4579439467.

Subtracting 7250220528 from its reverse (8250220527), we obtain a palindrome (999999999).

The spelling of 7250220528 in words is "seven billion, two hundred fifty million, two hundred twenty thousand, five hundred twenty-eight".