43255216809 has 16 divisors (see below), whose sum is σ = 73236346240. Its totient is φ = 24717266640.

The previous prime is 43255216801. The next prime is 43255216811. The reversal of 43255216809 is 90861255234.

43255216809 is a `hidden beast` number, since 4 + 3 + 2 + 552 + 16 + 80 + 9 = 666.

It is not a de Polignac number, because 43255216809 - 2³ = 43255216801 is a prime.

It is a super-2 number, since 2×43255216809² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43255216801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114431602 + ... + 114431979.

It is an arithmetic number, because the mean of its divisors is an integer number (4577271640).

Almost surely, 2^43255216809 is an apocalyptic number.

It is an amenable number.

43255216809 is a deficient number, since it is larger than the sum of its proper divisors (29981129431).

43255216809 is a wasteful number, since it uses less digits than its factorization.

43255216809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228863597 (or 228863591 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 43255216809 in words is "forty-three billion, two hundred fifty-five million, two hundred sixteen thousand, eight hundred nine".