31255 has 16 divisors (see below), whose sum is σ = 46080. Its totient is φ = 19872.

The previous prime is 31253. The next prime is 31259. The reversal of 31255 is 55213.

31255 = 8² + 9² + ... + 45².

It is a cyclic number.

It is not a de Polignac number, because 31255 - 2¹ = 31253 is a prime.

31255 is a lucky number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 642 + ... + 688.

It is an arithmetic number, because the mean of its divisors is an integer number (2880).

2³¹²⁵⁵ is an apocalyptic number.

31255 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

31255 is a deficient number, since it is larger than the sum of its proper divisors (14825).

31255 is a wasteful number, since it uses less digits than its factorization.

31255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78.

The product of its digits is 150, while the sum is 16.

The square root of 31255 is about 176.7908368666. The cubic root of 31255 is about 31.4997060525.

Adding to 31255 its reverse (55213), we get a palindrome (86468).

It can be divided in two parts, 3125 and 5, that multiplied together give a 6-th power (15625 = 5⁶).

The spelling of 31255 in words is "thirty-one thousand, two hundred fifty-five".