2153015550 has 144 divisors (see below), whose sum is σ = 6642110592. Its totient is φ = 489787200.

The previous prime is 2153015509. The next prime is 2153015569. The reversal of 2153015550 is 555103512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 713545 + ... + 716555.

It is an arithmetic number, because the mean of its divisors is an integer number (46125768).

Almost surely, 2^2153015550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2153015550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3321055296).

2153015550 is an abundant number, since it is smaller than the sum of its proper divisors (4489095042).

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

2153015550 is a wasteful number, since it uses less digits than its factorization.

2153015550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263 (or 3255 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 2153015550 is about 46400.5985952768. The cubic root of 2153015550 is about 1291.2660186932.

The spelling of 2153015550 in words is "two billion, one hundred fifty-three million, fifteen thousand, five hundred fifty".