31106642 has 16 divisors (see below), whose sum is σ = 53609472. Its totient is φ = 13260480.

The previous prime is 31106633. The next prime is 31106653. The reversal of 31106642 is 24660113.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 3143 + ... + 8490.

It is an arithmetic number, because the mean of its divisors is an integer number (3350592).

Almost surely, 2^31106642 is an apocalyptic number.

31106642 is a deficient number, since it is larger than the sum of its proper divisors (22502830).

31106642 is a wasteful number, since it uses less digits than its factorization.

31106642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11833.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 31106642 is about 5577.3328751295. The cubic root of 31106642 is about 314.4978713724.

Adding to 31106642 its reverse (24660113), we get a palindrome (55766755).

The spelling of 31106642 in words is "thirty-one million, one hundred six thousand, six hundred forty-two".