31814 has 4 divisors (see below), whose sum is σ = 47724. Its totient is φ = 15906.

The previous prime is 31799. The next prime is 31817. The reversal of 31814 is 41813.

It is a happy number.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31792 and 31801.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31814.

It is not an unprimeable number, because it can be changed into a prime (31817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7952 + ... + 7955.

It is an arithmetic number, because the mean of its divisors is an integer number (11931).

2³¹⁸¹⁴ is an apocalyptic number.

31814 is a deficient number, since it is larger than the sum of its proper divisors (15910).

31814 is a wasteful number, since it uses less digits than its factorization.

31814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15909.

The product of its digits is 96, while the sum is 17.

The square root of 31814 is about 178.3647947326. The cubic root of 31814 is about 31.6863896832.

Subtracting 31814 from its reverse (41813), we obtain a palindrome (9999).

The spelling of 31814 in words is "thirty-one thousand, eight hundred fourteen".