842230381 has 4 divisors (see below), whose sum is σ = 842768064. Its totient is φ = 841692700.

The previous prime is 842230349. The next prime is 842230393. The reversal of 842230381 is 183032248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 842230381 - 2⁵ = 842230349 is a prime.

It is a super-2 number, since 2×842230381² = 1418704029358810322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842230481) 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, 266485 + ... + 269626.

It is an arithmetic number, because the mean of its divisors is an integer number (210692016).

Almost surely, 2^842230381 is an apocalyptic number.

It is an amenable number.

842230381 is a deficient number, since it is larger than the sum of its proper divisors (537683).

842230381 is a wasteful number, since it uses less digits than its factorization.

842230381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537682.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 842230381 is about 29021.2057123752. The cubic root of 842230381 is about 944.3731576331.

The spelling of 842230381 in words is "eight hundred forty-two million, two hundred thirty thousand, three hundred eighty-one".