2153211636 has 48 divisors (see below), whose sum is σ = 5334698880. Its totient is φ = 673612800.

The previous prime is 2153211623. The next prime is 2153211673. The reversal of 2153211636 is 6361123512.

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, 58536 + ... + 87936.

It is an arithmetic number, because the mean of its divisors is an integer number (111139560).

Almost surely, 2^2153211636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2153211636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2667349440).

2153211636 is an abundant number, since it is smaller than the sum of its proper divisors (3181487244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2153211636 is a wasteful number, since it uses less digits than its factorization.

2153211636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29784 (or 29782 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 2153211636 is about 46402.7115156000. The cubic root of 2153211636 is about 1291.3052182091.

The spelling of 2153211636 in words is "two billion, one hundred fifty-three million, two hundred eleven thousand, six hundred thirty-six".