31383842 has 16 divisors (see below), whose sum is σ = 55537152. Its totient is φ = 13016160.

The previous prime is 31383841. The next prime is 31383889. The reversal of 31383842 is 24838313.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31383799 and 31383808.

It is not an unprimeable number, because it can be changed into a prime (31383841) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 35723 + ... + 36590.

It is an arithmetic number, because the mean of its divisors is an integer number (3471072).

Almost surely, 2^31383842 is an apocalyptic number.

31383842 is a deficient number, since it is larger than the sum of its proper divisors (24153310).

31383842 is a wasteful number, since it uses less digits than its factorization.

31383842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72353.

The product of its digits is 13824, while the sum is 32.

The square root of 31383842 is about 5602.1283455487. The cubic root of 31383842 is about 315.4293029526.

The spelling of 31383842 in words is "thirty-one million, three hundred eighty-three thousand, eight hundred forty-two".