31321042 has 8 divisors (see below), whose sum is σ = 47029500. Its totient is φ = 15644544.

The previous prime is 31321033. The next prime is 31321049. The reversal of 31321042 is 24012313.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25613721 + 5707321 = 5061^2 + 2389^2 .

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

It is not an unprimeable number, because it can be changed into a prime (31321049) 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, 5367 + ... + 9562.

Almost surely, 2^31321042 is an apocalyptic number.

31321042 is a deficient number, since it is larger than the sum of its proper divisors (15708458).

31321042 is a wasteful number, since it uses less digits than its factorization.

31321042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15980.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31321042 is about 5596.5205261841. The cubic root of 31321042 is about 315.2187679932.

Adding to 31321042 its reverse (24012313), we get a palindrome (55333355).

The spelling of 31321042 in words is "thirty-one million, three hundred twenty-one thousand, forty-two".