442340031 has 16 divisors (see below), whose sum is σ = 675244800. Its totient is φ = 252314688.

The previous prime is 442340009. The next prime is 442340053. The reversal of 442340031 is 130043244.

It is an interprime number because it is at equal distance from previous prime (442340009) and next prime (442340053).

It is a de Polignac number, because none of the positive numbers 2^k-442340031 is a prime.

It is a super-2 number, since 2×442340031² = 391329406050161922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442340831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6561 + ... + 30458.

It is an arithmetic number, because the mean of its divisors is an integer number (42202800).

Almost surely, 2^442340031 is an apocalyptic number.

442340031 is a deficient number, since it is larger than the sum of its proper divisors (232904769).

442340031 is a wasteful number, since it uses less digits than its factorization.

442340031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37598.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 442340031 is about 21031.8812995890. The cubic root of 442340031 is about 761.9364462947.

Adding to 442340031 its reverse (130043244), we get a palindrome (572383275).

The spelling of 442340031 in words is "four hundred forty-two million, three hundred forty thousand, thirty-one".