11551227173 has 4 divisors (see below), whose sum is σ = 11863422540. Its totient is φ = 11239031808.

The previous prime is 11551227157. The next prime is 11551227221. The reversal of 11551227173 is 37172215511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37172215511 = 4643 ⋅8006077.

It can be written as a sum of positive squares in 2 ways, for example, as 4824274849 + 6726952324 = 69457^2 + 82018^2 .

It is a cyclic number.

It is not a de Polignac number, because 11551227173 - 2⁴ = 11551227157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551227073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156097628 + ... + 156097701.

It is an arithmetic number, because the mean of its divisors is an integer number (2965855635).

Almost surely, 2^11551227173 is an apocalyptic number.

It is an amenable number.

11551227173 is a deficient number, since it is larger than the sum of its proper divisors (312195367).

11551227173 is an equidigital number, since it uses as much as digits as its factorization.

11551227173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312195366.

The product of its digits is 14700, while the sum is 35.

The spelling of 11551227173 in words is "eleven billion, five hundred fifty-one million, two hundred twenty-seven thousand, one hundred seventy-three".