2136553221 has 32 divisors (see below), whose sum is σ = 3224592000. Its totient is φ = 1246452480.

The previous prime is 2136553207. The next prime is 2136553231. The reversal of 2136553221 is 1223556312.

It is not a de Polignac number, because 2136553221 - 2⁶ = 2136553157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2136553231) 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, 330795 + ... + 337191.

It is an arithmetic number, because the mean of its divisors is an integer number (100768500).

Almost surely, 2^2136553221 is an apocalyptic number.

It is an amenable number.

2136553221 is a deficient number, since it is larger than the sum of its proper divisors (1088038779).

2136553221 is a wasteful number, since it uses less digits than its factorization.

2136553221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6789.

The product of its digits is 10800, while the sum is 30.

The square root of 2136553221 is about 46222.8646991941. The cubic root of 2136553221 is about 1287.9665137717.

The spelling of 2136553221 in words is "two billion, one hundred thirty-six million, five hundred fifty-three thousand, two hundred twenty-one".