31442 has 8 divisors (see below), whose sum is σ = 48000. Its totient is φ = 15444.

The previous prime is 31397. The next prime is 31469. The reversal of 31442 is 24413.

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

It is a nialpdrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31442.

It is an unprimeable number.

31442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59 + ... + 257.

It is an arithmetic number, because the mean of its divisors is an integer number (6000).

2³¹⁴⁴² is an apocalyptic number.

31442 is a deficient number, since it is larger than the sum of its proper divisors (16558).

31442 is a wasteful number, since it uses less digits than its factorization.

31442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280.

The product of its digits is 96, while the sum is 14.

The square root of 31442 is about 177.3189217202. The cubic root of 31442 is about 31.5624025419.

Adding to 31442 its reverse (24413), we get a palindrome (55855).

The spelling of 31442 in words is "thirty-one thousand, four hundred forty-two".