31045 has 8 divisors (see below), whose sum is σ = 42624. Its totient is φ = 21264.

The previous prime is 31039. The next prime is 31051. The reversal of 31045 is 54013.

It is an interprime number because it is at equal distance from previous prime (31039) and next prime (31051).

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 31045 - 2⁵ = 31013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409 + ... + 478.

It is an arithmetic number, because the mean of its divisors is an integer number (5328).

2³¹⁰⁴⁵ is an apocalyptic number.

31045 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31045 is a deficient number, since it is larger than the sum of its proper divisors (11579).

31045 is an equidigital number, since it uses as much as digits as its factorization.

31045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 31045 is about 176.1959136870. The cubic root of 31045 is about 31.4289994039.

Adding to 31045 its reverse (54013), we get a palindrome (85058).

The spelling of 31045 in words is "thirty-one thousand, forty-five".