31442231 has 8 divisors (see below), whose sum is σ = 33487344. Its totient is φ = 29418880.

The previous prime is 31442189. The next prime is 31442239. The reversal of 31442231 is 13224413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31442231 - 2¹⁸ = 31180087 is a prime.

It is a super-2 number, since 2×31442231² = 1977227780514722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442239) 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 7 ways as a sum of consecutive naturals, for example, 2405 + ... + 8286.

It is an arithmetic number, because the mean of its divisors is an integer number (4185918).

Almost surely, 2^31442231 is an apocalyptic number.

31442231 is a deficient number, since it is larger than the sum of its proper divisors (2045113).

31442231 is a wasteful number, since it uses less digits than its factorization.

31442231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10881.

The product of its digits is 576, while the sum is 20.

The square root of 31442231 is about 5607.3372468579. The cubic root of 31442231 is about 315.6247983660.

Adding to 31442231 its reverse (13224413), we get a palindrome (44666644).

The spelling of 31442231 in words is "thirty-one million, four hundred forty-two thousand, two hundred thirty-one".