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5115981 = 313233563
BaseRepresentation
bin10011100001000001001101
3100121220210210
4103201001031
52302202411
6301353033
761325253
oct23410115
910556723
105115981
112984792
121868779
1310a1810
149725d3
156b0ca6
hex4e104d

5115981 has 16 divisors (see below), whose sum is σ = 7390656. Its totient is φ = 3129216.

The previous prime is 5115947. The next prime is 5116039. The reversal of 5115981 is 1895115.

5115981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5115981 - 26 = 5115917 is a prime.

It is a super-2 number, since 2×51159812 = 52346523184722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5115911) 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, 8806 + ... + 9368.

It is an arithmetic number, because the mean of its divisors is an integer number (461916).

Almost surely, 25115981 is an apocalyptic number.

It is an amenable number.

5115981 is a deficient number, since it is larger than the sum of its proper divisors (2274675).

5115981 is a wasteful number, since it uses less digits than its factorization.

5115981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812.

The product of its digits is 1800, while the sum is 30.

The square root of 5115981 is about 2261.8534435281. The cubic root of 5115981 is about 172.3096661422.

The spelling of 5115981 in words is "five million, one hundred fifteen thousand, nine hundred eighty-one".

Divisors: 1 3 13 39 233 563 699 1689 3029 7319 9087 21957 131179 393537 1705327 5115981