211431413317 has 2 divisors, whose sum is σ = 211431413318. Its totient is φ = 211431413316.

The previous prime is 211431413309. The next prime is 211431413341. The reversal of 211431413317 is 713314134112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209300760036 + 2130653281 = 457494^2 + 46159^2 .

It is a cyclic number.

It is not a de Polignac number, because 211431413317 - 2³ = 211431413309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211431413357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105715706658 + 105715706659.

It is an arithmetic number, because the mean of its divisors is an integer number (105715706659).

Almost surely, 2^211431413317 is an apocalyptic number.

It is an amenable number.

211431413317 is a deficient number, since it is larger than the sum of its proper divisors (1).

211431413317 is an equidigital number, since it uses as much as digits as its factorization.

211431413317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

Adding to 211431413317 its reverse (713314134112), we get a palindrome (924745547429).

The spelling of 211431413317 in words is "two hundred eleven billion, four hundred thirty-one million, four hundred thirteen thousand, three hundred seventeen".