31427 has 4 divisors (see below), whose sum is σ = 34296. Its totient is φ = 28560.

The previous prime is 31397. The next prime is 31469. The reversal of 31427 is 72413.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31427 - 2¹⁰ = 30403 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31427.

It is not an unprimeable number, because it can be changed into a prime (31477) 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, 1418 + ... + 1439.

It is an arithmetic number, because the mean of its divisors is an integer number (8574).

2³¹⁴²⁷ is an apocalyptic number.

31427 is a deficient number, since it is larger than the sum of its proper divisors (2869).

31427 is a wasteful number, since it uses less digits than its factorization.

31427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2868.

The product of its digits is 168, while the sum is 17.

The square root of 31427 is about 177.2766200039. The cubic root of 31427 is about 31.5573825968.

The spelling of 31427 in words is "thirty-one thousand, four hundred twenty-seven".