Search a number
-
+
13813825 = 52552553
BaseRepresentation
bin110100101100…
…100001000001
3221222211000011
4310230201001
512014020300
61212024521
7225262354
oct64544101
927884004
1013813825
117885593
124762141
132b2877c
141b9829b
15132ceba
hexd2c841

13813825 has 6 divisors (see below), whose sum is σ = 17129174. Its totient is φ = 11051040.

The previous prime is 13813801. The next prime is 13813829. The reversal of 13813825 is 52831831.

It can be written as a sum of positive squares in 3 ways, for example, as 278784 + 13535041 = 528^2 + 3679^2 .

It is not a de Polignac number, because 13813825 - 29 = 13813313 is a prime.

It is a super-2 number, since 2×138138252 = 381643522261250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13813829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 276252 + ... + 276301.

Almost surely, 213813825 is an apocalyptic number.

It is an amenable number.

13813825 is a deficient number, since it is larger than the sum of its proper divisors (3315349).

13813825 is an equidigital number, since it uses as much as digits as its factorization.

13813825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552563 (or 552558 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 13813825 is about 3716.6954408453. The cubic root of 13813825 is about 239.9411024455.

The spelling of 13813825 in words is "thirteen million, eight hundred thirteen thousand, eight hundred twenty-five".

Divisors: 1 5 25 552553 2762765 13813825