2154216140 has 24 divisors (see below), whose sum is σ = 4538413152. Its totient is φ = 858913280.

The previous prime is 2154216139. The next prime is 2154216151. The reversal of 2154216140 is 416124512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166949 + ... + 179388.

It is an arithmetic number, because the mean of its divisors is an integer number (189100548).

Almost surely, 2^2154216140 is an apocalyptic number.

2154216140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2154216140 is an abundant number, since it is smaller than the sum of its proper divisors (2384197012).

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

2154216140 is a wasteful number, since it uses less digits than its factorization.

2154216140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346657 (or 346655 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 2154216140 is about 46413.5340175686. The cubic root of 2154216140 is about 1291.5059911041.

The spelling of 2154216140 in words is "two billion, one hundred fifty-four million, two hundred sixteen thousand, one hundred forty".