442031431 has 2 divisors, whose sum is σ = 442031432. Its totient is φ = 442031430.

The previous prime is 442031413. The next prime is 442031441. The reversal of 442031431 is 134130244.

Together with previous prime (442031413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442031431 - 2¹¹ = 442029383 is a prime.

It is a super-2 number, since 2×442031431² = 390783571983815522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442031441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221015715 + 221015716.

It is an arithmetic number, because the mean of its divisors is an integer number (221015716).

Almost surely, 2^442031431 is an apocalyptic number.

442031431 is a deficient number, since it is larger than the sum of its proper divisors (1).

442031431 is an equidigital number, since it uses as much as digits as its factorization.

442031431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 442031431 is about 21024.5435384457. The cubic root of 442031431 is about 761.7592159043.

Adding to 442031431 its reverse (134130244), we get a palindrome (576161675).

The spelling of 442031431 in words is "four hundred forty-two million, thirty-one thousand, four hundred thirty-one".