31475 has 6 divisors (see below), whose sum is σ = 39060. Its totient is φ = 25160.

The previous prime is 31469. The next prime is 31477. The reversal of 31475 is 57413.

It is a happy number.

It is not a de Polignac number, because 31475 - 2⁸ = 31219 is a prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31475.

It is not an unprimeable number, because it can be changed into a prime (31477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 605 + ... + 654.

It is an arithmetic number, because the mean of its divisors is an integer number (6510).

2³¹⁴⁷⁵ is an apocalyptic number.

31475 is a deficient number, since it is larger than the sum of its proper divisors (7585).

31475 is a wasteful number, since it uses less digits than its factorization.

31475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269 (or 1264 counting only the distinct ones).

The product of its digits is 420, while the sum is 20.

The square root of 31475 is about 177.4119499921. The cubic root of 31475 is about 31.5734408040.

Adding to 31475 its reverse (57413), we get a palindrome (88888).

The spelling of 31475 in words is "thirty-one thousand, four hundred seventy-five".