2151143550 has 72 divisors (see below), whose sum is σ = 5788808064. Its totient is φ = 572705280.

The previous prime is 2151143549. The next prime is 2151143581. The reversal of 2151143550 is 553411512.

2151143550 is a `hidden beast` number, since 21 + 51 + 1 + 43 + 550 = 666.

2151143550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 299299 + ... + 306401.

It is an arithmetic number, because the mean of its divisors is an integer number (80400112).

Almost surely, 2^2151143550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2151143550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2894404032).

2151143550 is an abundant number, since it is smaller than the sum of its proper divisors (3637664514).

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

2151143550 is a wasteful number, since it uses less digits than its factorization.

2151143550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7794 (or 7786 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 2151143550 is about 46380.4220550008. The cubic root of 2151143550 is about 1290.8916676413.

The spelling of 2151143550 in words is "two billion, one hundred fifty-one million, one hundred forty-three thousand, five hundred fifty".