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31301033101 = 1329383321661
BaseRepresentation
bin11101001001101011…
…111101110010001101
32222210102102020021021
4131021223331302031
51003101031024401
622213545434141
72155445251162
oct351153756215
988712366237
1031301033101
11123026874a8
12609679b951
132c4aaa2380
14172d158069
15c32e702a1
hex749afdc8d

31301033101 has 16 divisors (see below), whose sum is σ = 34881885360. Its totient is φ = 27888376320.

The previous prime is 31301033083. The next prime is 31301033161. The reversal of 31301033101 is 10133010313.

It can be written as a sum of positive squares in 8 ways, for example, as 5412544900 + 25888488201 = 73570^2 + 160899^2 .

It is a cyclic number.

It is not a de Polignac number, because 31301033101 - 29 = 31301032589 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 (31301033161) 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, 1434211 + ... + 1455871.

It is an arithmetic number, because the mean of its divisors is an integer number (2180117835).

Almost surely, 231301033101 is an apocalyptic number.

It is an amenable number.

31301033101 is a deficient number, since it is larger than the sum of its proper divisors (3580852259).

31301033101 is a wasteful number, since it uses less digits than its factorization.

31301033101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25536.

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

Adding to 31301033101 its reverse (10133010313), we get a palindrome (41434043414).

The spelling of 31301033101 in words is "thirty-one billion, three hundred one million, thirty-three thousand, one hundred one".

Divisors: 1 13 29 377 3833 21661 49829 111157 281593 628169 1445041 8166197 83026613 1079345969 2407771777 31301033101