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13030251 = 3132941281
BaseRepresentation
bin110001101101…
…001101101011
3220112000010220
4301231031223
511313432001
61143141123
7215520033
oct61551553
926460126
1013030251
11739a903
1244447a3
132912c10
141a328c3
151225c36
hexc6d36b

13030251 has 32 divisors (see below), whose sum is σ = 19897920. Its totient is φ = 7526400.

The previous prime is 13030231. The next prime is 13030267. The reversal of 13030251 is 15203031.

It is a happy number.

It is not a de Polignac number, because 13030251 - 27 = 13030123 is a prime.

It is a super-2 number, since 2×130302512 = 339574882246002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13030251.

It is not an unprimeable number, because it can be changed into a prime (13030201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46231 + ... + 46511.

It is an arithmetic number, because the mean of its divisors is an integer number (621810).

Almost surely, 213030251 is an apocalyptic number.

13030251 is a deficient number, since it is larger than the sum of its proper divisors (6867669).

13030251 is a wasteful number, since it uses less digits than its factorization.

13030251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 13030251 is about 3609.7438967328. The cubic root of 13030251 is about 235.3157126785.

Adding to 13030251 its reverse (15203031), we get a palindrome (28233282).

It can be divided in two parts, 130 and 30251, that added together give a triangular number (30381 = T246).

The spelling of 13030251 in words is "thirteen million, thirty thousand, two hundred fifty-one".

Divisors: 1 3 13 29 39 41 87 123 281 377 533 843 1131 1189 1599 3567 3653 8149 10959 11521 15457 24447 34563 46371 105937 149773 317811 334109 449319 1002327 4343417 13030251