31442142 has 8 divisors (see below), whose sum is σ = 62884296. Its totient is φ = 10480712.

The previous prime is 31442141. The next prime is 31442161. The reversal of 31442142 is 24124413.

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

31442142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442141) 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 3 ways as a sum of consecutive naturals, for example, 2620173 + ... + 2620184.

It is an arithmetic number, because the mean of its divisors is an integer number (7860537).

Almost surely, 2^31442142 is an apocalyptic number.

31442142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31442142 is a wasteful number, since it uses less digits than its factorization.

31442142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5240362.

The product of its digits is 768, while the sum is 21.

The square root of 31442142 is about 5607.3293108217. The cubic root of 31442142 is about 315.6245005645.

Adding to 31442142 its reverse (24124413), we get a palindrome (55566555).

The spelling of 31442142 in words is "thirty-one million, four hundred forty-two thousand, one hundred forty-two".