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23131200213 = 3411199130457
BaseRepresentation
bin10101100010101110…
…100001101011010101
32012201001102201110000
4111202232201223111
5334333041401323
614343141521513
71446132646332
oct254256415325
965631381400
1023131200213
11989aa610a0
124596713299
132248308024
1411960c1989
15905ac8e43
hex562ba1ad5

23131200213 has 40 divisors (see below), whose sum is σ = 37885003200. Its totient is φ = 13948355520.

The previous prime is 23131200199. The next prime is 23131200217. The reversal of 23131200213 is 31200213132.

It is not a de Polignac number, because 23131200213 - 29 = 23131199701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131200217) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 112081 + ... + 242537.

It is an arithmetic number, because the mean of its divisors is an integer number (947125080).

Almost surely, 223131200213 is an apocalyptic number.

It is an amenable number.

23131200213 is a deficient number, since it is larger than the sum of its proper divisors (14753802987).

23131200213 is a wasteful number, since it uses less digits than its factorization.

23131200213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130679 (or 130670 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 23131200213 its reverse (31200213132), we get a palindrome (54331413345).

The spelling of 23131200213 in words is "twenty-three billion, one hundred thirty-one million, two hundred thousand, two hundred thirteen".

Divisors: 1 3 9 11 27 33 81 99 199 297 597 891 1791 2189 5373 6567 16119 19701 59103 130457 177309 391371 1174113 1435027 3522339 4305081 10567017 12915243 25960943 38745729 77882829 116237187 233648487 285570373 700945461 856711119 2102836383 2570133357 7710400071 23131200213