11223256671 has 32 divisors (see below), whose sum is σ = 18314749440. Its totient is φ = 6735916800.

The previous prime is 11223256633. The next prime is 11223256691. The reversal of 11223256671 is 17665232211.

11223256671 is a `hidden beast` number, since 1 + 1 + 2 + 23 + 2 + 566 + 71 = 666.

It is not a de Polignac number, because 11223256671 - 2⁶ = 11223256607 is a prime.

It is a super-2 number, since 2×11223256671² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11223256691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152850 + ... + 214031.

It is an arithmetic number, because the mean of its divisors is an integer number (572335920).

Almost surely, 2^11223256671 is an apocalyptic number.

11223256671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11223256671 is a deficient number, since it is larger than the sum of its proper divisors (7091492769).

11223256671 is a wasteful number, since it uses less digits than its factorization.

11223256671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367004 (or 366998 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

Adding to 11223256671 its reverse (17665232211), we get a palindrome (28888488882).

The spelling of 11223256671 in words is "eleven billion, two hundred twenty-three million, two hundred fifty-six thousand, six hundred seventy-one".