2172055551 has 8 divisors (see below), whose sum is σ = 2902022784. Its totient is φ = 1445062680.

The previous prime is 2172055549. The next prime is 2172055583. The reversal of 2172055551 is 1555502712.

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

It is not a de Polignac number, because 2172055551 - 2¹ = 2172055549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172055051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741885 + ... + 744806.

It is an arithmetic number, because the mean of its divisors is an integer number (362752848).

Almost surely, 2^2172055551 is an apocalyptic number.

2172055551 is a deficient number, since it is larger than the sum of its proper divisors (729967233).

2172055551 is a wasteful number, since it uses less digits than its factorization.

2172055551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487181.

The product of its (nonzero) digits is 17500, while the sum is 33.

The square root of 2172055551 is about 46605.3167675105. The cubic root of 2172055551 is about 1295.0612516061.

The spelling of 2172055551 in words is "two billion, one hundred seventy-two million, fifty-five thousand, five hundred fifty-one".