2157803855 has 16 divisors (see below), whose sum is σ = 2655379584. Its totient is φ = 1682409120.

The previous prime is 2157803833. The next prime is 2157803909. The reversal of 2157803855 is 5583087512.

2157803855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2157803855 - 2¹⁰ = 2157802831 is a prime.

It is a super-2 number, since 2×2157803855² = 9312234953305722050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89660 + ... + 111150.

It is an arithmetic number, because the mean of its divisors is an integer number (165961224).

Almost surely, 2^2157803855 is an apocalyptic number.

2157803855 is a deficient number, since it is larger than the sum of its proper divisors (497575729).

2157803855 is a wasteful number, since it uses less digits than its factorization.

2157803855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22006.

The product of its (nonzero) digits is 336000, while the sum is 44.

The square root of 2157803855 is about 46452.1673875396. The cubic root of 2157803855 is about 1292.2225681468. Note that the first 3 decimals are identical.

The spelling of 2157803855 in words is "two billion, one hundred fifty-seven million, eight hundred three thousand, eight hundred fifty-five".