7528275281 has 4 divisors (see below), whose sum is σ = 7532651364. Its totient is φ = 7523899200.

The previous prime is 7528275241. The next prime is 7528275283. The reversal of 7528275281 is 1825728257.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1825728257 = 257 ⋅7104001.

It can be written as a sum of positive squares in 2 ways, for example, as 6527185681 + 1001089600 = 80791^2 + 31640^2 .

It is a cyclic number.

It is not a de Polignac number, because 7528275281 - 2²⁶ = 7461166417 is a prime.

It is a super-2 number, since 2×7528275281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7528275283) 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, 2185460 + ... + 2188901.

It is an arithmetic number, because the mean of its divisors is an integer number (1883162841).

Almost surely, 2^7528275281 is an apocalyptic number.

It is an amenable number.

7528275281 is a deficient number, since it is larger than the sum of its proper divisors (4376083).

7528275281 is a wasteful number, since it uses less digits than its factorization.

7528275281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4376082.

The product of its digits is 627200, while the sum is 47.

The square root of 7528275281 is about 86765.6342165491. The cubic root of 7528275281 is about 1959.8906020608.

The spelling of 7528275281 in words is "seven billion, five hundred twenty-eight million, two hundred seventy-five thousand, two hundred eighty-one".