43055317491 has 4 divisors (see below), whose sum is σ = 57407089992. Its totient is φ = 28703544992.

The previous prime is 43055317477. The next prime is 43055317511. The reversal of 43055317491 is 19471355034.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43055317491 - 2⁷ = 43055317363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43055317471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7175886246 + ... + 7175886251.

It is an arithmetic number, because the mean of its divisors is an integer number (14351772498).

Almost surely, 2^43055317491 is an apocalyptic number.

43055317491 is a deficient number, since it is larger than the sum of its proper divisors (14351772501).

43055317491 is a wasteful number, since it uses less digits than its factorization.

43055317491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14351772500.

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 43055317491 in words is "forty-three billion, fifty-five million, three hundred seventeen thousand, four hundred ninety-one".