7521533 has 2 divisors, whose sum is σ = 7521534. Its totient is φ = 7521532.

The previous prime is 7521467. The next prime is 7521539. The reversal of 7521533 is 3351257.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5938969 + 1582564 = 2437^2 + 1258^2 .

It is a cyclic number.

It is not a de Polignac number, because 7521533 - 2⁸ = 7521277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7521539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3760766 + 3760767.

It is an arithmetic number, because the mean of its divisors is an integer number (3760767).

Almost surely, 2^7521533 is an apocalyptic number.

It is an amenable number.

7521533 is a deficient number, since it is larger than the sum of its proper divisors (1).

7521533 is an equidigital number, since it uses as much as digits as its factorization.

7521533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 26.

The square root of 7521533 is about 2742.5413397067. The cubic root of 7521533 is about 195.9305338306.

The spelling of 7521533 in words is "seven million, five hundred twenty-one thousand, five hundred thirty-three".