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31211200211197 is a prime number
BaseRepresentation
bin1110001100010111011001…
…00000000110100011111101
311002111202120012120112211111
413012023230200012203331
513042331014223224242
6150214121043122021
76400635431332216
oct706135440064375
9132452505515744
1031211200211197
119a43660932636
123600b33973311
131455285280a56
1479c8b71c040d
15391d1ce00817
hex1c62ec8068fd

31211200211197 has 2 divisors, whose sum is σ = 31211200211198. Its totient is φ = 31211200211196.

The previous prime is 31211200211189. The next prime is 31211200211267. The reversal of 31211200211197 is 79111200211213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28925960297796 + 2285239913401 = 5378286^2 + 1511701^2 .

It is a cyclic number.

It is not a de Polignac number, because 31211200211197 - 23 = 31211200211189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31211200214197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605600105598 + 15605600105599.

It is an arithmetic number, because the mean of its divisors is an integer number (15605600105599).

Almost surely, 231211200211197 is an apocalyptic number.

It is an amenable number.

31211200211197 is a deficient number, since it is larger than the sum of its proper divisors (1).

31211200211197 is an equidigital number, since it uses as much as digits as its factorization.

31211200211197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 31.

The spelling of 31211200211197 in words is "thirty-one trillion, two hundred eleven billion, two hundred million, two hundred eleven thousand, one hundred ninety-seven".