31442542 has 8 divisors (see below), whose sum is σ = 47221056. Its totient is φ = 15702192.

The previous prime is 31442539. The next prime is 31442557. The reversal of 31442542 is 24524413.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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, 7383 + ... + 10834.

It is an arithmetic number, because the mean of its divisors is an integer number (5902632).

Almost surely, 2^31442542 is an apocalyptic number.

31442542 is a deficient number, since it is larger than the sum of its proper divisors (15778514).

31442542 is a wasteful number, since it uses less digits than its factorization.

31442542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19082.

The product of its digits is 3840, while the sum is 25.

The square root of 31442542 is about 5607.3649783120. The cubic root of 31442542 is about 315.6258389939.

Adding to 31442542 its reverse (24524413), we get a palindrome (55966955).

The spelling of 31442542 in words is "thirty-one million, four hundred forty-two thousand, five hundred forty-two".