31396 has 12 divisors (see below), whose sum is σ = 56448. Its totient is φ = 15272.

The previous prime is 31393. The next prime is 31397. The reversal of 31396 is 69313.

31396 = 24² + 25² + ... + 47².

31396 is nontrivially palindromic in base 3.

It is not an unprimeable number, because it can be changed into a prime (31391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105 + ... + 271.

It is an arithmetic number, because the mean of its divisors is an integer number (4704).

2³¹³⁹⁶ is an apocalyptic number.

It is an amenable number.

31396 is a deficient number, since it is larger than the sum of its proper divisors (25052).

31396 is a wasteful number, since it uses less digits than its factorization.

31396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 216 counting only the distinct ones).

The product of its digits is 486, while the sum is 22.

The square root of 31396 is about 177.1891644543. The cubic root of 31396 is about 31.5470029795.

The spelling of 31396 in words is "thirty-one thousand, three hundred ninety-six".