7521223 has 4 divisors (see below), whose sum is σ = 7527808. Its totient is φ = 7514640.

The previous prime is 7521221. The next prime is 7521229. The reversal of 7521223 is 3221257.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7521223 - 2¹ = 7521221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7521194 and 7521203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7521221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1086 + ... + 4027.

It is an arithmetic number, because the mean of its divisors is an integer number (1881952).

Almost surely, 2^7521223 is an apocalyptic number.

7521223 is a deficient number, since it is larger than the sum of its proper divisors (6585).

7521223 is a wasteful number, since it uses less digits than its factorization.

7521223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584.

The product of its digits is 840, while the sum is 22.

The square root of 7521223 is about 2742.4848222005. The cubic root of 7521223 is about 195.9278420345.

It can be divided in two parts, 7521 and 223, that added together give a square (7744 = 88²).

The spelling of 7521223 in words is "seven million, five hundred twenty-one thousand, two hundred twenty-three".