43085551 has 2 divisors, whose sum is σ = 43085552. Its totient is φ = 43085550.

The previous prime is 43085491. The next prime is 43085579. The reversal of 43085551 is 15558034.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43085551 - 2⁷ = 43085423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43085951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21542775 + 21542776.

It is an arithmetic number, because the mean of its divisors is an integer number (21542776).

Almost surely, 2^43085551 is an apocalyptic number.

43085551 is a deficient number, since it is larger than the sum of its proper divisors (1).

43085551 is an equidigital number, since it uses as much as digits as its factorization.

43085551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 43085551 is about 6563.9584855482. The cubic root of 43085551 is about 350.5719925947.

The spelling of 43085551 in words is "forty-three million, eighty-five thousand, five hundred fifty-one".