442164831 has 4 divisors (see below), whose sum is σ = 589553112. Its totient is φ = 294776552.

The previous prime is 442164823. The next prime is 442164847. The reversal of 442164831 is 138461244.

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 442164831 - 2³ = 442164823 is a prime.

It is a super-2 number, since 2×442164831² = 391019475546517122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 442164792 and 442164801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442164871) 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, 73694136 + ... + 73694141.

It is an arithmetic number, because the mean of its divisors is an integer number (147388278).

Almost surely, 2^442164831 is an apocalyptic number.

442164831 is a deficient number, since it is larger than the sum of its proper divisors (147388281).

442164831 is a wasteful number, since it uses less digits than its factorization.

442164831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147388280.

The product of its digits is 18432, while the sum is 33.

The square root of 442164831 is about 21027.7157817962. The cubic root of 442164831 is about 761.8358382525.

The spelling of 442164831 in words is "four hundred forty-two million, one hundred sixty-four thousand, eight hundred thirty-one".