31303642 has 8 divisors (see below), whose sum is σ = 47046816. Its totient is φ = 15621372.

The previous prime is 31303631. The next prime is 31303651. The reversal of 31303642 is 24630313.

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

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, 13918 + ... + 16009.

It is an arithmetic number, because the mean of its divisors is an integer number (5880852).

Almost surely, 2^31303642 is an apocalyptic number.

31303642 is a deficient number, since it is larger than the sum of its proper divisors (15743174).

31303642 is a wasteful number, since it uses less digits than its factorization.

31303642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30452.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 31303642 is about 5594.9657729069. The cubic root of 31303642 is about 315.1603852766.

Adding to 31303642 its reverse (24630313), we get a palindrome (55933955).

The spelling of 31303642 in words is "thirty-one million, three hundred three thousand, six hundred forty-two".