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103031 = 197523
BaseRepresentation
bin11001001001110111
312020022222
4121021313
511244111
62112555
7606245
oct311167
9166288
10103031
1170455
124b75b
1337b86
1429795
15207db
hex19277

103031 has 4 divisors (see below), whose sum is σ = 103752. Its totient is φ = 102312.

The previous prime is 103007. The next prime is 103043. The reversal of 103031 is 130301.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 130301 = 229569.

It is a cyclic number.

It is not a de Polignac number, because 103031 - 26 = 102967 is a prime.

It is a super-2 number, since 2×1030312 = 21230773922, which contains 22 as substring.

It is a Duffinian number.

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 103031.

It is not an unprimeable number, because it can be changed into a prime (103001) 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, 65 + ... + 458.

It is an arithmetic number, because the mean of its divisors is an integer number (25938).

2103031 is an apocalyptic number.

103031 is a deficient number, since it is larger than the sum of its proper divisors (721).

103031 is an equidigital number, since it uses as much as digits as its factorization.

103031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720.

The product of its (nonzero) digits is 9, while the sum is 8.

The square root of 103031 is about 320.9844232981. The cubic root of 103031 is about 46.8801837230.

Adding to 103031 its reverse (130301), we get a palindrome (233332).

The spelling of 103031 in words is "one hundred three thousand, thirty-one".

Divisors: 1 197 523 103031