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3031 = 7433
BaseRepresentation
bin101111010111
311011021
4233113
544111
622011
711560
oct5727
94137
103031
112306
121907
1314c2
141167
15d71
hexbd7

3031 has 4 divisors (see below), whose sum is σ = 3472. Its totient is φ = 2592.

The previous prime is 3023. The next prime is 3037. The reversal of 3031 is 1303.

It is a happy number.

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

It is a 5-Lehmer number, since φ(3031) divides (3031-1)5.

It is a cyclic number.

It is not a de Polignac number, because 3031 - 23 = 3023 is a prime.

It is a super-2 number, since 2×30312 = 18373922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (7), and also a Moran number because the ratio is a prime number: 433 = 3031 / (3 + 0 + 3 + 1).

It is an Ulam number.

3031 is a lucky number.

It is a plaindrome in base 14.

It is a nialpdrome in base 5 and base 15.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3037) 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, 210 + ... + 223.

It is an arithmetic number, because the mean of its divisors is an integer number (868).

23031 is an apocalyptic number.

3031 is a deficient number, since it is larger than the sum of its proper divisors (441).

3031 is an equidigital number, since it uses as much as digits as its factorization.

3031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440.

The product of its (nonzero) digits is 9, while the sum is 7.

The square root of 3031 is about 55.0545184340. The cubic root of 3031 is about 14.4720030525.

Adding to 3031 its reverse (1303), we get a palindrome (4334).

Subtracting from 3031 its reverse (1303), we obtain a cube (1728 = 123).

The spelling of 3031 in words is "three thousand, thirty-one".

Divisors: 1 7 433 3031