2172356855 has 8 divisors (see below), whose sum is σ = 2620336272. Its totient is φ = 1728880128.

The previous prime is 2172356843. The next prime is 2172356863. The reversal of 2172356855 is 5586532712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2172356855 - 2¹² = 2172352759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1124609 + ... + 1126538.

It is an arithmetic number, because the mean of its divisors is an integer number (327542034).

Almost surely, 2^2172356855 is an apocalyptic number.

2172356855 is a deficient number, since it is larger than the sum of its proper divisors (447979417).

2172356855 is a wasteful number, since it uses less digits than its factorization.

2172356855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251345.

The product of its digits is 504000, while the sum is 44.

The square root of 2172356855 is about 46608.5491621441. The cubic root of 2172356855 is about 1295.1211317649.

The spelling of 2172356855 in words is "two billion, one hundred seventy-two million, three hundred fifty-six thousand, eight hundred fifty-five".