2556216201 has 32 divisors (see below), whose sum is σ = 4251875328. Its totient is φ = 1327098240.

The previous prime is 2556216191. The next prime is 2556216209. The reversal of 2556216201 is 1026126552.

It is not a de Polignac number, because 2556216201 - 2¹⁸ = 2555954057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2556216209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 664981 + ... + 668813.

It is an arithmetic number, because the mean of its divisors is an integer number (132871104).

Almost surely, 2^2556216201 is an apocalyptic number.

2556216201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2556216201 is a deficient number, since it is larger than the sum of its proper divisors (1695659127).

2556216201 is a wasteful number, since it uses less digits than its factorization.

2556216201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6741.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 2556216201 is about 50559.0367886889. The cubic root of 2556216201 is about 1367.3064452943.

The spelling of 2556216201 in words is "two billion, five hundred fifty-six million, two hundred sixteen thousand, two hundred one".