442161131 has 8 divisors (see below), whose sum is σ = 472116480. Its totient is φ = 413100072.

The previous prime is 442161121. The next prime is 442161151. The reversal of 442161131 is 131161244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442161131 is a prime.

It is a super-2 number, since 2×442161131² = 391012931534398322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442161097 and 442161106.

It is not an unprimeable number, because it can be changed into a prime (442161121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222551 + ... + 224528.

It is an arithmetic number, because the mean of its divisors is an integer number (59014560).

Almost surely, 2^442161131 is an apocalyptic number.

442161131 is a deficient number, since it is larger than the sum of its proper divisors (29955349).

442161131 is a wasteful number, since it uses less digits than its factorization.

442161131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447145.

The product of its digits is 576, while the sum is 23.

The square root of 442161131 is about 21027.6278024888. The cubic root of 442161131 is about 761.8337132527.

The spelling of 442161131 in words is "four hundred forty-two million, one hundred sixty-one thousand, one hundred thirty-one".