442055531 has 4 divisors (see below), whose sum is σ = 442833000. Its totient is φ = 441278064.

The previous prime is 442055527. The next prime is 442055543. The reversal of 442055531 is 135550244.

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 442055531 - 2² = 442055527 is a prime.

It is a super-2 number, since 2×442055531² = 390826184975383922, 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 = 442055494 and 442055503.

It is not an unprimeable number, because it can be changed into a prime (442055231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387881 + ... + 389018.

It is an arithmetic number, because the mean of its divisors is an integer number (110708250).

Almost surely, 2^442055531 is an apocalyptic number.

442055531 is a deficient number, since it is larger than the sum of its proper divisors (777469).

442055531 is an equidigital number, since it uses as much as digits as its factorization.

442055531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777468.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 442055531 is about 21025.1166703065. The cubic root of 442055531 is about 761.7730596133.

The spelling of 442055531 in words is "four hundred forty-two million, fifty-five thousand, five hundred thirty-one".