43248521 has 2 divisors, whose sum is σ = 43248522. Its totient is φ = 43248520.

The previous prime is 43248479. The next prime is 43248547. The reversal of 43248521 is 12584234.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42758521 + 490000 = 6539^2 + 700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43248521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43248551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21624260 + 21624261.

It is an arithmetic number, because the mean of its divisors is an integer number (21624261).

Almost surely, 2^43248521 is an apocalyptic number.

It is an amenable number.

43248521 is a deficient number, since it is larger than the sum of its proper divisors (1).

43248521 is an equidigital number, since it uses as much as digits as its factorization.

43248521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 29.

The square root of 43248521 is about 6576.3607717339. The cubic root of 43248521 is about 351.0134463454.

The spelling of 43248521 in words is "forty-three million, two hundred forty-eight thousand, five hundred twenty-one".