11523456217 has 16 divisors (see below), whose sum is σ = 14186172672. Its totient is φ = 9115237440.

The previous prime is 11523456173. The next prime is 11523456223. The reversal of 11523456217 is 71265432511.

It is a cyclic number.

It is not a de Polignac number, because 11523456217 - 2²³ = 11515067609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11523456247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430263 + ... + 456259.

It is an arithmetic number, because the mean of its divisors is an integer number (886635792).

Almost surely, 2^11523456217 is an apocalyptic number.

It is an amenable number.

11523456217 is a deficient number, since it is larger than the sum of its proper divisors (2662716455).

11523456217 is a wasteful number, since it uses less digits than its factorization.

11523456217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30888.

The product of its digits is 50400, while the sum is 37.

Adding to 11523456217 its reverse (71265432511), we get a palindrome (82788888728).

The spelling of 11523456217 in words is "eleven billion, five hundred twenty-three million, four hundred fifty-six thousand, two hundred seventeen".