7522281 has 32 divisors (see below), whose sum is σ = 12432000. Its totient is φ = 4463424.

The previous prime is 7522267. The next prime is 7522283. The reversal of 7522281 is 1822257.

It is not a de Polignac number, because 7522281 - 2⁶ = 7522217 is a prime.

It is a super-3 number, since 3×7522281³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (7522283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9810 + ... + 10548.

It is an arithmetic number, because the mean of its divisors is an integer number (388500).

Almost surely, 2^7522281 is an apocalyptic number.

It is an amenable number.

7522281 is a deficient number, since it is larger than the sum of its proper divisors (4909719).

7522281 is a wasteful number, since it uses less digits than its factorization.

7522281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 784 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 7522281 is about 2742.6777061842. The cubic root of 7522281 is about 195.9370285696.

The spelling of 7522281 in words is "seven million, five hundred twenty-two thousand, two hundred eighty-one".