2156200540 has 24 divisors (see below), whose sum is σ = 4876331040. Its totient is φ = 796135488.

The previous prime is 2156200523. The next prime is 2156200577. The reversal of 2156200540 is 450026512.

It is a congruent number.

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, 4146280 + ... + 4146799.

It is an arithmetic number, because the mean of its divisors is an integer number (203180460).

Almost surely, 2^2156200540 is an apocalyptic number.

2156200540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2156200540 is an abundant number, since it is smaller than the sum of its proper divisors (2720130500).

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

2156200540 is a wasteful number, since it uses less digits than its factorization.

2156200540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8293101 (or 8293099 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2156200540 is about 46434.9064820852. The cubic root of 2156200540 is about 1291.9024350663.

The spelling of 2156200540 in words is "two billion, one hundred fifty-six million, two hundred thousand, five hundred forty".