31102 has 4 divisors (see below), whose sum is σ = 46656. Its totient is φ = 15550.

The previous prime is 31091. The next prime is 31121. The reversal of 31102 is 20113.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7774 + ... + 7777.

It is an arithmetic number, because the mean of its divisors is an integer number (11664).

2³¹¹⁰² is an apocalyptic number.

31102 is a deficient number, since it is larger than the sum of its proper divisors (15554).

31102 is a wasteful number, since it uses less digits than its factorization.

31102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15553.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 31102 is about 176.3575912741. The cubic root of 31102 is about 31.4482226571.

Adding to 31102 its reverse (20113), we get a palindrome (51215).

The spelling of 31102 in words is "thirty-one thousand, one hundred two".