7532313221 has 4 divisors (see below), whose sum is σ = 7735889292. Its totient is φ = 7328737152.

The previous prime is 7532313211. The next prime is 7532313227. The reversal of 7532313221 is 1223132357.

7532313221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1223132357 = 53 ⋅23077969.

It can be written as a sum of positive squares in 2 ways, for example, as 6501196900 + 1031116321 = 80630^2 + 32111^2 .

It is a cyclic number.

It is not a de Polignac number, because 7532313221 - 2³⁰ = 6458571397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7532313227) 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, 101787980 + ... + 101788053.

It is an arithmetic number, because the mean of its divisors is an integer number (1933972323).

Almost surely, 2^7532313221 is an apocalyptic number.

It is an amenable number.

7532313221 is a deficient number, since it is larger than the sum of its proper divisors (203576071).

7532313221 is a wasteful number, since it uses less digits than its factorization.

7532313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203576070.

The product of its digits is 7560, while the sum is 29.

The square root of 7532313221 is about 86788.9003329343. The cubic root of 7532313221 is about 1960.2409481828.

Adding to 7532313221 its reverse (1223132357), we get a palindrome (8755445578).

The spelling of 7532313221 in words is "seven billion, five hundred thirty-two million, three hundred thirteen thousand, two hundred twenty-one".