2055221887 has 4 divisors (see below), whose sum is σ = 2163391480. Its totient is φ = 1947052296.

The previous prime is 2055221843. The next prime is 2055221977. The reversal of 2055221887 is 7881225502.

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

It is a cyclic number.

It is not a de Polignac number, because 2055221887 - 2¹⁵ = 2055189119 is a prime.

It is a super-3 number, since 3×2055221887³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2055221807) 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, 54084768 + ... + 54084805.

It is an arithmetic number, because the mean of its divisors is an integer number (540847870).

Almost surely, 2^2055221887 is an apocalyptic number.

2055221887 is a deficient number, since it is larger than the sum of its proper divisors (108169593).

2055221887 is a wasteful number, since it uses less digits than its factorization.

2055221887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108169592.

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 2055221887 is about 45334.5551097615. Note that the first 3 decimals coincide. The cubic root of 2055221887 is about 1271.4118027865.

The spelling of 2055221887 in words is "two billion, fifty-five million, two hundred twenty-one thousand, eight hundred eighty-seven".