2173315851 has 12 divisors (see below), whose sum is σ = 3587696112. Its totient is φ = 1241894736.

The previous prime is 2173315849. The next prime is 2173315867. The reversal of 2173315851 is 1585133712.

It is a happy number.

2173315851 is a `hidden beast` number, since 2 + 1 + 73 + 3 + 1 + 585 + 1 = 666.

It is not a de Polignac number, because 2173315851 - 2¹ = 2173315849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2173315891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17248476 + ... + 17248601.

It is an arithmetic number, because the mean of its divisors is an integer number (298974676).

Almost surely, 2^2173315851 is an apocalyptic number.

2173315851 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2173315851 is a deficient number, since it is larger than the sum of its proper divisors (1414380261).

2173315851 is a wasteful number, since it uses less digits than its factorization.

2173315851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34497090 (or 34497087 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 2173315851 is about 46618.8357962744. The cubic root of 2173315851 is about 1295.3116826041.

The spelling of 2173315851 in words is "two billion, one hundred seventy-three million, three hundred fifteen thousand, eight hundred fifty-one".