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2312101231 = 111731214977
BaseRepresentation
bin1000100111001111…
…1101110101101111
312222010121220121221
42021303331311233
514213344214411
61021232204211
7111203351626
oct21163756557
95863556557
102312101231
11a87136970
12546399667
132ab02124b
1417d0dc6bd
15d7eb2071
hex89cfdd6f

2312101231 has 8 divisors (see below), whose sum is σ = 2536874064. Its totient is φ = 2089758720.

The previous prime is 2312101229. The next prime is 2312101237. The reversal of 2312101231 is 1321012132.

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

It is a cyclic number.

It is not a de Polignac number, because 2312101231 - 21 = 2312101229 is a prime.

It is a super-2 number, since 2×23121012312 = 10691624204783430722, which 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 (2312101237) 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, 605586 + ... + 609391.

It is an arithmetic number, because the mean of its divisors is an integer number (317109258).

Almost surely, 22312101231 is an apocalyptic number.

2312101231 is a deficient number, since it is larger than the sum of its proper divisors (224772833).

2312101231 is a wasteful number, since it uses less digits than its factorization.

2312101231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215161.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2312101231 is about 48084.3137727887. The cubic root of 2312101231 is about 1322.3171023616.

Adding to 2312101231 its reverse (1321012132), we get a palindrome (3633113363).

The spelling of 2312101231 in words is "two billion, three hundred twelve million, one hundred one thousand, two hundred thirty-one".

Divisors: 1 11 173 1903 1214977 13364747 210191021 2312101231