31340642 has 8 divisors (see below), whose sum is σ = 47056896. Its totient is φ = 15655012.

The previous prime is 31340629. The next prime is 31340669. The reversal of 31340642 is 24604313.

It is a happy number.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4898 + ... + 9309.

It is an arithmetic number, because the mean of its divisors is an integer number (5882112).

Almost surely, 2^31340642 is an apocalyptic number.

31340642 is a deficient number, since it is larger than the sum of its proper divisors (15716254).

31340642 is a wasteful number, since it uses less digits than its factorization.

31340642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15312.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 31340642 is about 5598.2713403335. The cubic root of 31340642 is about 315.2845065421.

Adding to 31340642 its reverse (24604313), we get a palindrome (55944955).

The spelling of 31340642 in words is "thirty-one million, three hundred forty thousand, six hundred forty-two".