7522221518 has 8 divisors (see below), whose sum is σ = 12895236912. Its totient is φ = 3223809216.

The previous prime is 7522221491. The next prime is 7522221559. The reversal of 7522221518 is 8151222257.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268650755 + ... + 268650782.

It is an arithmetic number, because the mean of its divisors is an integer number (1611904614).

Almost surely, 2^7522221518 is an apocalyptic number.

7522221518 is a deficient number, since it is larger than the sum of its proper divisors (5373015394).

7522221518 is a wasteful number, since it uses less digits than its factorization.

7522221518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537301546.

The product of its digits is 22400, while the sum is 35.

The square root of 7522221518 is about 86730.7414818990. The cubic root of 7522221518 is about 1959.3651211472.

The spelling of 7522221518 in words is "seven billion, five hundred twenty-two million, two hundred twenty-one thousand, five hundred eighteen".