385358243831 has 4 divisors (see below), whose sum is σ = 420390811464. Its totient is φ = 350325676200.

The previous prime is 385358243747. The next prime is 385358243863. The reversal of 385358243831 is 138342853583.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385358243831 is a prime.

It is a super-2 number, since 2×385358243831² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385358248831) 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, 17516283800 + ... + 17516283821.

It is an arithmetic number, because the mean of its divisors is an integer number (105097702866).

Almost surely, 2^385358243831 is an apocalyptic number.

385358243831 is a deficient number, since it is larger than the sum of its proper divisors (35032567633).

385358243831 is a wasteful number, since it uses less digits than its factorization.

385358243831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35032567632.

The product of its digits is 8294400, while the sum is 53.

The spelling of 385358243831 in words is "three hundred eighty-five billion, three hundred fifty-eight million, two hundred forty-three thousand, eight hundred thirty-one".