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13870131 = 311420307
BaseRepresentation
bin110100111010…
…010000110011
3222002200020120
4310322100303
512022321011
61213141323
7225615462
oct64722063
928080216
1013870131
117913920
12478a843
132b482a2
141bb09d9
15133ea06
hexd3a433

13870131 has 8 divisors (see below), whose sum is σ = 20174784. Its totient is φ = 8406120.

The previous prime is 13870121. The next prime is 13870151. The reversal of 13870131 is 13107831.

13870131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13870131 - 25 = 13870099 is a prime.

It is a super-2 number, since 2×138701312 = 384761067914322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13870111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210121 + ... + 210186.

It is an arithmetic number, because the mean of its divisors is an integer number (2521848).

Almost surely, 213870131 is an apocalyptic number.

13870131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13870131 is a deficient number, since it is larger than the sum of its proper divisors (6304653).

13870131 is a wasteful number, since it uses less digits than its factorization.

13870131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420321.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 13870131 is about 3724.2624773235. The cubic root of 13870131 is about 240.2666654023.

Adding to 13870131 its reverse (13107831), we get a palindrome (26977962).

The spelling of 13870131 in words is "thirteen million, eight hundred seventy thousand, one hundred thirty-one".

Divisors: 1 3 11 33 420307 1260921 4623377 13870131