7522222257 has 24 divisors (see below), whose sum is σ = 11889060768. Its totient is φ = 4545129600.

The previous prime is 7522222241. The next prime is 7522222277.

7522222257 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7522222257 - 2⁴ = 7522222241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7522222277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82008 + ... + 147545.

It is an arithmetic number, because the mean of its divisors is an integer number (495377532).

Almost surely, 2^7522222257 is an apocalyptic number.

It is an amenable number.

7522222257 is a deficient number, since it is larger than the sum of its proper divisors (4366838511).

7522222257 is a wasteful number, since it uses less digits than its factorization.

7522222257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229901 (or 229898 counting only the distinct ones).

The product of its digits is 78400, while the sum is 36.

The square root of 7522222257 is about 86730.7457422107. The cubic root of 7522222257 is about 1959.3651853114.

It can be divided in two parts, 75222 and 22257, that added together give a palindrome (97479).

The spelling of 7522222257 in words is "seven billion, five hundred twenty-two million, two hundred twenty-two thousand, two hundred fifty-seven".