43070581 has 2 divisors, whose sum is σ = 43070582. Its totient is φ = 43070580.

The previous prime is 43070569. The next prime is 43070591. The reversal of 43070581 is 18507034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27468081 + 15602500 = 5241^2 + 3950^2 .

It is a cyclic number.

It is not a de Polignac number, because 43070581 - 2¹⁷ = 42939509 is a prime.

It is a super-2 number, since 2×43070581² = 3710149895355122, which contains 22 as substring.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43070561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21535290 + 21535291.

It is an arithmetic number, because the mean of its divisors is an integer number (21535291).

Almost surely, 2^43070581 is an apocalyptic number.

It is an amenable number.

43070581 is a deficient number, since it is larger than the sum of its proper divisors (1).

43070581 is an equidigital number, since it uses as much as digits as its factorization.

43070581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 43070581 is about 6562.8180684825. The cubic root of 43070581 is about 350.5313860144.

The spelling of 43070581 in words is "forty-three million, seventy thousand, five hundred eighty-one".