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311323141 is a prime number
BaseRepresentation
bin10010100011100…
…110101000000101
3210200210212001201
4102203212220011
51114144320031
650520422501
710500126433
oct2243465005
9720725051
10311323141
1114a808758
1288317a31
134c66399c
142d4bdd53
151c4e8d61
hex128e6a05

311323141 has 2 divisors, whose sum is σ = 311323142. Its totient is φ = 311323140.

The previous prime is 311323109. The next prime is 311323153. The reversal of 311323141 is 141323113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309232225 + 2090916 = 17585^2 + 1446^2 .

It is a cyclic number.

It is not a de Polignac number, because 311323141 - 25 = 311323109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311323171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155661570 + 155661571.

It is an arithmetic number, because the mean of its divisors is an integer number (155661571).

Almost surely, 2311323141 is an apocalyptic number.

It is an amenable number.

311323141 is a deficient number, since it is larger than the sum of its proper divisors (1).

311323141 is an equidigital number, since it uses as much as digits as its factorization.

311323141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 311323141 is about 17644.3515324310. The cubic root of 311323141 is about 677.7514694010.

Adding to 311323141 its reverse (141323113), we get a palindrome (452646254).

The spelling of 311323141 in words is "three hundred eleven million, three hundred twenty-three thousand, one hundred forty-one".