31047 has 8 divisors (see below), whose sum is σ = 42240. Its totient is φ = 20280.

The previous prime is 31039. The next prime is 31051. The reversal of 31047 is 74013.

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

It is not a de Polignac number, because 31047 - 2³ = 31039 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31047.

It is not an unprimeable number, because it can be changed into a prime (31147) 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, 172 + ... + 302.

It is an arithmetic number, because the mean of its divisors is an integer number (5280).

2³¹⁰⁴⁷ is an apocalyptic number.

31047 is a deficient number, since it is larger than the sum of its proper divisors (11193).

31047 is a wasteful number, since it uses less digits than its factorization.

31047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 31047 is about 176.2015890961. The cubic root of 31047 is about 31.4296743021.

The spelling of 31047 in words is "thirty-one thousand, forty-seven".