2172400266 has 16 divisors (see below), whose sum is σ = 4494621600. Its totient is φ = 699163248.

The previous prime is 2172400249. The next prime is 2172400273. The reversal of 2172400266 is 6620042712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6242356 + ... + 6242703.

It is an arithmetic number, because the mean of its divisors is an integer number (280913850).

Almost surely, 2^2172400266 is an apocalyptic number.

2172400266 is an abundant number, since it is smaller than the sum of its proper divisors (2322221334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2172400266 is a wasteful number, since it uses less digits than its factorization.

2172400266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12485093.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 2172400266 is about 46609.0148576432. The cubic root of 2172400266 is about 1295.1297586669.

Adding to 2172400266 its reverse (6620042712), we get a palindrome (8792442978).

The spelling of 2172400266 in words is "two billion, one hundred seventy-two million, four hundred thousand, two hundred sixty-six".