442161431 has 4 divisors (see below), whose sum is σ = 442267272. Its totient is φ = 442055592.

The previous prime is 442161413. The next prime is 442161439. The reversal of 442161431 is 134161244.

It is a happy number.

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 442161431 - 2²⁶ = 375052567 is a prime.

It is a super-2 number, since 2×442161431² = 391013462127935522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442161431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442161439) 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, 46385 + ... + 55098.

It is an arithmetic number, because the mean of its divisors is an integer number (110566818).

Almost surely, 2^442161431 is an apocalyptic number.

442161431 is a deficient number, since it is larger than the sum of its proper divisors (105841).

442161431 is a wasteful number, since it uses less digits than its factorization.

442161431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105840.

The product of its digits is 2304, while the sum is 26.

The square root of 442161431 is about 21027.6349359599. The cubic root of 442161431 is about 761.8338855505.

The spelling of 442161431 in words is "four hundred forty-two million, one hundred sixty-one thousand, four hundred thirty-one".