442343531 has 6 divisors (see below), whose sum is σ = 514562940. Its totient is φ = 379151556.

The previous prime is 442343471. The next prime is 442343533. The reversal of 442343531 is 135343244.

It is not a de Polignac number, because 442343531 - 2¹⁰ = 442342507 is a prime.

It is a super-2 number, since 2×442343531² = 391335598835095922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442343494 and 442343503.

It is not an unprimeable number, because it can be changed into a prime (442343533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4513661 + ... + 4513758.

It is an arithmetic number, because the mean of its divisors is an integer number (85760490).

Almost surely, 2^442343531 is an apocalyptic number.

442343531 is a deficient number, since it is larger than the sum of its proper divisors (72219409).

442343531 is an equidigital number, since it uses as much as digits as its factorization.

442343531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9027433 (or 9027426 counting only the distinct ones).

The product of its digits is 17280, while the sum is 29.

The square root of 442343531 is about 21031.9645064364. The cubic root of 442343531 is about 761.9384558878.

Adding to 442343531 its reverse (135343244), we get a palindrome (577686775).

The spelling of 442343531 in words is "four hundred forty-two million, three hundred forty-three thousand, five hundred thirty-one".