Search a number
-
+
80031 = 3737103
BaseRepresentation
bin10011100010011111
311001210010
4103202133
510030111
61414303
7452220
oct234237
9131703
1080031
1155146
123a393
132a573
1421247
1518aa6
hex1389f

80031 has 16 divisors (see below), whose sum is σ = 126464. Its totient is φ = 44064.

The previous prime is 80021. The next prime is 80039. The reversal of 80031 is 13008.

80031 = 692 + 702 + ... + 822.

It is not a de Polignac number, because 80031 - 25 = 79999 is a prime.

It is a super-2 number, since 2×800312 = 12809921922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 79989 and 80016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726 + ... + 828.

It is an arithmetic number, because the mean of its divisors is an integer number (7904).

280031 is an apocalyptic number.

80031 is a deficient number, since it is larger than the sum of its proper divisors (46433).

80031 is a wasteful number, since it uses less digits than its factorization.

80031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 80031 is about 282.8975079424. The cubic root of 80031 is about 43.0942587048.

Adding to 80031 its reverse (13008), we get a palindrome (93039).

The spelling of 80031 in words is "eighty thousand, thirty-one".

Divisors: 1 3 7 21 37 103 111 259 309 721 777 2163 3811 11433 26677 80031