2173366313249 has 4 divisors (see below), whose sum is σ = 2194884791700. Its totient is φ = 2151847834800.

The previous prime is 2173366313231. The next prime is 2173366313269. The reversal of 2173366313249 is 9423136633712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1050758254225 + 1122608059024 = 1025065^2 + 1059532^2 .

It is a cyclic number.

It is not a de Polignac number, because 2173366313249 - 2¹⁶ = 2173366247713 is a prime.

It is a super-2 number, since 2×2173366313249² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2173366313197 and 2173366313206.

It is not an unprimeable number, because it can be changed into a prime (2173366313269) 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, 10759239074 + ... + 10759239275.

It is an arithmetic number, because the mean of its divisors is an integer number (548721197925).

Almost surely, 2^{2173366313249} is an apocalyptic number.

It is an amenable number.

2173366313249 is a deficient number, since it is larger than the sum of its proper divisors (21518478451).

2173366313249 is a wasteful number, since it uses less digits than its factorization.

2173366313249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21518478450.

The product of its digits is 2939328, while the sum is 50.

The spelling of 2173366313249 in words is "two trillion, one hundred seventy-three billion, three hundred sixty-six million, three hundred thirteen thousand, two hundred forty-nine".