422531 has 4 divisors (see below), whose sum is σ = 423864. Its totient is φ = 421200.

The previous prime is 422479. The next prime is 422537. The reversal of 422531 is 135224.

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 not a de Polignac number, because 422531 - 2¹⁸ = 160387 is a prime.

It is a super-2 number, since 2×422531² = 357064891922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422537) 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, 116 + ... + 926.

It is an arithmetic number, because the mean of its divisors is an integer number (105966).

2⁴²²⁵³¹ is an apocalyptic number.

422531 is a deficient number, since it is larger than the sum of its proper divisors (1333).

422531 is an equidigital number, since it uses as much as digits as its factorization.

422531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332.

The product of its digits is 240, while the sum is 17.

The square root of 422531 is about 650.0238457164. The cubic root of 422531 is about 75.0388539422.

Adding to 422531 its reverse (135224), we get a palindrome (557755).

The spelling of 422531 in words is "four hundred twenty-two thousand, five hundred thirty-one".