442302431 has 4 divisors (see below), whose sum is σ = 442344672. Its totient is φ = 442260192.

The previous prime is 442302407. The next prime is 442302433. The reversal of 442302431 is 134203244.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442302431 is a prime.

It is a super-2 number, since 2×442302431² = 391262880937019522, 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 = 442302397 and 442302406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442302433) 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, 7655 + ... + 30711.

It is an arithmetic number, because the mean of its divisors is an integer number (110586168).

Almost surely, 2^442302431 is an apocalyptic number.

442302431 is a deficient number, since it is larger than the sum of its proper divisors (42241).

442302431 is a wasteful number, since it uses less digits than its factorization.

442302431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42240.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 442302431 is about 21030.9873995493. The cubic root of 442302431 is about 761.9148568535.

Adding to 442302431 its reverse (134203244), we get a palindrome (576505675).

The spelling of 442302431 in words is "four hundred forty-two million, three hundred two thousand, four hundred thirty-one".