2154203550 has 144 divisors (see below), whose sum is σ = 6043394448. Its totient is φ = 549619200.

The previous prime is 2154203539. The next prime is 2154203561. The reversal of 2154203550 is 553024512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2154203539) and next prime (2154203561).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 976749 + ... + 978951.

It is an arithmetic number, because the mean of its divisors is an integer number (41968017).

Almost surely, 2^2154203550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154203550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3021697224).

2154203550 is an abundant number, since it is smaller than the sum of its proper divisors (3889190898).

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

2154203550 is a wasteful number, since it uses less digits than its factorization.

2154203550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315 (or 2307 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 2154203550 is about 46413.3983888273. The cubic root of 2154203550 is about 1291.5034750934.

The spelling of 2154203550 in words is "two billion, one hundred fifty-four million, two hundred three thousand, five hundred fifty".