31485 has 8 divisors (see below), whose sum is σ = 50400. Its totient is φ = 16784.

The previous prime is 31481. The next prime is 31489. The reversal of 31485 is 58413.

31485 = 33² + 34² + ... + 50².

It is an interprime number because it is at equal distance from previous prime (31481) and next prime (31489).

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

It is a cyclic number.

It is not a de Polignac number, because 31485 - 2² = 31481 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1035 + ... + 1064.

It is an arithmetic number, because the mean of its divisors is an integer number (6300).

2³¹⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

31485 is a deficient number, since it is larger than the sum of its proper divisors (18915).

31485 is a wasteful number, since it uses less digits than its factorization.

31485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107.

The product of its digits is 480, while the sum is 21.

The square root of 31485 is about 177.4401307484. The cubic root of 31485 is about 31.5767842086.

Adding to 31485 its reverse (58413), we get a palindrome (89898).

The spelling of 31485 in words is "thirty-one thousand, four hundred eighty-five".