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31212020310322 = 2149181578664769
BaseRepresentation
bin1110001100011000111010…
…11000100010000100110010
311002111211200100201220100011
413012030131120202010302
513042334204144412242
6150214334300445134
76400664650136605
oct706143530420462
9132454610656304
1031212020310322
119a43a41851205
1236011225497aa
1314553861501c7
1479c95409c33c
15391d69de7d17
hex1c631d622132

31212020310322 has 16 divisors (see below), whose sum is σ = 47392644663000. Its totient is φ = 15415629419520.

The previous prime is 31212020310293. The next prime is 31212020310343. The reversal of 31212020310322 is 22301302021213.

It can be written as a sum of positive squares in 4 ways, for example, as 12028487540521 + 19183532769801 = 3468211^2 + 4379901^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31212020310293 and 31212020310302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289278447 + ... + 289386322.

Almost surely, 231212020310322 is an apocalyptic number.

31212020310322 is a deficient number, since it is larger than the sum of its proper divisors (16180624352678).

31212020310322 is a wasteful number, since it uses less digits than its factorization.

31212020310322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578665101.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31212020310322 its reverse (22301302021213), we get a palindrome (53513322331535).

The spelling of 31212020310322 in words is "thirty-one trillion, two hundred twelve billion, twenty million, three hundred ten thousand, three hundred twenty-two".

Divisors: 1 2 149 181 298 362 26969 53938 578664769 1157329538 86221050581 104738323189 172442101162 209476646378 15606010155161 31212020310322