13530557 has 2 divisors, whose sum is σ = 13530558. Its totient is φ = 13530556.

The previous prime is 13530523. The next prime is 13530563. The reversal of 13530557 is 75503531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12880921 + 649636 = 3589^2 + 806^2 .

It is a cyclic number.

It is not a de Polignac number, because 13530557 - 2⁸ = 13530301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13530457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765278 + 6765279.

It is an arithmetic number, because the mean of its divisors is an integer number (6765279).

Almost surely, 2^13530557 is an apocalyptic number.

It is an amenable number.

13530557 is a deficient number, since it is larger than the sum of its proper divisors (1).

13530557 is an equidigital number, since it uses as much as digits as its factorization.

13530557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7875, while the sum is 29.

The square root of 13530557 is about 3678.3905447899. The cubic root of 13530557 is about 238.2896750629.

The spelling of 13530557 in words is "thirteen million, five hundred thirty thousand, five hundred fifty-seven".