11423451217 has 2 divisors, whose sum is σ = 11423451218. Its totient is φ = 11423451216.

The previous prime is 11423451107. The next prime is 11423451229. The reversal of 11423451217 is 71215432411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9487539216 + 1935912001 = 97404^2 + 43999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11423451217 is a prime.

It is not a weakly prime, because it can be changed into another prime (11423151217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5711725608 + 5711725609.

It is an arithmetic number, because the mean of its divisors is an integer number (5711725609).

Almost surely, 2^11423451217 is an apocalyptic number.

It is an amenable number.

11423451217 is a deficient number, since it is larger than the sum of its proper divisors (1).

11423451217 is an equidigital number, since it uses as much as digits as its factorization.

11423451217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 31.

Adding to 11423451217 its reverse (71215432411), we get a palindrome (82638883628).

The spelling of 11423451217 in words is "eleven billion, four hundred twenty-three million, four hundred fifty-one thousand, two hundred seventeen".