31402 has 8 divisors (see below), whose sum is σ = 53856. Its totient is φ = 13452.

The previous prime is 31397. The next prime is 31469. The reversal of 31402 is 20413.

31402 = 19² + 20² + ... + 46².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 16.

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1108 + ... + 1135.

It is an arithmetic number, because the mean of its divisors is an integer number (6732).

2³¹⁴⁰² is an apocalyptic number.

31402 is a deficient number, since it is larger than the sum of its proper divisors (22454).

31402 is a wasteful number, since it uses less digits than its factorization.

31402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 31402 is about 177.2060947033. The cubic root of 31402 is about 31.5490124707.

Adding to 31402 its reverse (20413), we get a palindrome (51815).

The spelling of 31402 in words is "thirty-one thousand, four hundred two".