7513522 has 8 divisors (see below), whose sum is σ = 11283372. Its totient is φ = 3752400.

The previous prime is 7513481. The next prime is 7513529. The reversal of 7513522 is 2253157.

It can be written as a sum of positive squares in 2 ways, for example, as 7513081 + 441 = 2741^2 + 21^2 .

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

It is not an unprimeable number, because it can be changed into a prime (7513529) 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, 772 + ... + 3952.

Almost surely, 2^7513522 is an apocalyptic number.

7513522 is a deficient number, since it is larger than the sum of its proper divisors (3769850).

7513522 is a wasteful number, since it uses less digits than its factorization.

7513522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4364.

The product of its digits is 2100, while the sum is 25.

The square root of 7513522 is about 2741.0804439126. The cubic root of 7513522 is about 195.8609488545.

Adding to 7513522 its reverse (2253157), we get a palindrome (9766679).

It can be divided in two parts, 75135 and 22, that added together give a palindrome (75157).

The spelling of 7513522 in words is "seven million, five hundred thirteen thousand, five hundred twenty-two".