Search a number
-
+
15131080 = 235378277
BaseRepresentation
bin111001101110…
…000111001000
31001110201221101
4321232013020
512333143310
61300151144
7242416636
oct71560710
931421841
1015131080
1185a5228
1250984b4
13319a203
14201c356
1514dd43a
hexe6e1c8

15131080 has 16 divisors (see below), whose sum is σ = 34045020. Its totient is φ = 6052416.

The previous prime is 15131063. The next prime is 15131089. The reversal of 15131080 is 8013151.

15131080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 14638276 + 492804 = 3826^2 + 702^2 .

It is not an unprimeable number, because it can be changed into a prime (15131089) 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, 189099 + ... + 189178.

Almost surely, 215131080 is an apocalyptic number.

15131080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15131080 is an abundant number, since it is smaller than the sum of its proper divisors (18913940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15131080 is a wasteful number, since it uses less digits than its factorization.

15131080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378288 (or 378284 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 15131080 is about 3889.8688923921. The cubic root of 15131080 is about 247.3375051465.

The spelling of 15131080 in words is "fifteen million, one hundred thirty-one thousand, eighty".

Divisors: 1 2 4 5 8 10 20 40 378277 756554 1513108 1891385 3026216 3782770 7565540 15131080