43098521 has 2 divisors, whose sum is σ = 43098522. Its totient is φ = 43098520.

The previous prime is 43098493. The next prime is 43098547. The reversal of 43098521 is 12589034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37027225 + 6071296 = 6085^2 + 2464^2 .

It is a cyclic number.

It is not a de Polignac number, because 43098521 - 2¹⁸ = 42836377 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (43098221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21549260 + 21549261.

It is an arithmetic number, because the mean of its divisors is an integer number (21549261).

Almost surely, 2^43098521 is an apocalyptic number.

It is an amenable number.

43098521 is a deficient number, since it is larger than the sum of its proper divisors (1).

43098521 is an equidigital number, since it uses as much as digits as its factorization.

43098521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 43098521 is about 6564.9463821116. The cubic root of 43098521 is about 350.6071665100.

The spelling of 43098521 in words is "forty-three million, ninety-eight thousand, five hundred twenty-one".