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13230211031 = 31426781001
BaseRepresentation
bin11000101001001010…
…01111111111010111
31021011000222100121222
430110211033333113
5204043413223111
610024453200555
7645566636552
oct142445177727
937130870558
1013230211031
11567a122404
12269293015b
13132aca604b
148d7173699
155267777db
hex31494ffd7

13230211031 has 4 divisors (see below), whose sum is σ = 13656992064. Its totient is φ = 12803430000.

The previous prime is 13230210989. The next prime is 13230211067. The reversal of 13230211031 is 13011203231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13011203231 = 131000861787.

It is a cyclic number.

It is not a de Polignac number, because 13230211031 - 226 = 13163102167 is a prime.

It is a super-2 number, since 2×132302110312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13230217031) 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, 213390470 + ... + 213390531.

It is an arithmetic number, because the mean of its divisors is an integer number (3414248016).

Almost surely, 213230211031 is an apocalyptic number.

13230211031 is a deficient number, since it is larger than the sum of its proper divisors (426781033).

13230211031 is an equidigital number, since it uses as much as digits as its factorization.

13230211031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426781032.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 13230211031 its reverse (13011203231), we get a palindrome (26241414262).

The spelling of 13230211031 in words is "thirteen billion, two hundred thirty million, two hundred eleven thousand, thirty-one".

Divisors: 1 31 426781001 13230211031