42921830771 has 4 divisors (see below), whose sum is σ = 43049195592. Its totient is φ = 42794465952.

The previous prime is 42921830759. The next prime is 42921830779. The reversal of 42921830771 is 17703812924.

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 42921830771 - 2¹⁰ = 42921829747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42921830779) 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, 63681905 + ... + 63682578.

It is an arithmetic number, because the mean of its divisors is an integer number (10762298898).

Almost surely, 2^42921830771 is an apocalyptic number.

42921830771 is a deficient number, since it is larger than the sum of its proper divisors (127364821).

42921830771 is a wasteful number, since it uses less digits than its factorization.

42921830771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127364820.

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 42921830771 in words is "forty-two billion, nine hundred twenty-one million, eight hundred thirty thousand, seven hundred seventy-one".