31942 has 4 divisors (see below), whose sum is σ = 47916. Its totient is φ = 15970.

The previous prime is 31907. The next prime is 31957. The reversal of 31942 is 24913.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24913 = 7 ⋅3559.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7984 + ... + 7987.

It is an arithmetic number, because the mean of its divisors is an integer number (11979).

2³¹⁹⁴² is an apocalyptic number.

31942 is a deficient number, since it is larger than the sum of its proper divisors (15974).

31942 is a wasteful number, since it uses less digits than its factorization.

31942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15973.

The product of its digits is 216, while the sum is 19.

The square root of 31942 is about 178.7232497466. The cubic root of 31942 is about 31.7288283431.

It can be divided in two parts, 319 and 42, that added together give a square (361 = 19²).

The spelling of 31942 in words is "thirty-one thousand, nine hundred forty-two".