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31130130301 = 2937149194713
BaseRepresentation
bin11100111111100000…
…000001011101111101
32222100111211110200221
4130333200001131331
51002223303132201
622145002421341
72151301512244
oct347740013575
988314743627
1031130130301
1112225168716
126049501851
132c2156515a
14171458b95b
15c22e624a1
hex73f80177d

31130130301 has 16 divisors (see below), whose sum is σ = 33296094000. Its totient is φ = 29047915008.

The previous prime is 31130130287. The next prime is 31130130319. The reversal of 31130130301 is 10303103113.

It can be written as a sum of positive squares in 8 ways, for example, as 233631225 + 30896499076 = 15285^2 + 175774^2 .

It is not a de Polignac number, because 31130130301 - 227 = 30995912573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130130401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62521 + ... + 257233.

It is an arithmetic number, because the mean of its divisors is an integer number (2081005875).

Almost surely, 231130130301 is an apocalyptic number.

It is an amenable number.

31130130301 is a deficient number, since it is larger than the sum of its proper divisors (2165963699).

31130130301 is a wasteful number, since it uses less digits than its factorization.

31130130301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194928.

The product of its (nonzero) digits is 81, while the sum is 16.

Adding to 31130130301 its reverse (10303103113), we get a palindrome (41433233414).

The spelling of 31130130301 in words is "thirty-one billion, one hundred thirty million, one hundred thirty thousand, three hundred one".

Divisors: 1 29 37 149 1073 4321 5513 159877 194713 5646677 7204381 29012237 208927049 841354873 1073452769 31130130301