2156548550 has 48 divisors (see below), whose sum is σ = 4335472512. Its totient is φ = 793363200.

The previous prime is 2156548543. The next prime is 2156548567. The reversal of 2156548550 is 558456512.

It is a junction number, because it is equal to n+sod(n) for n = 2156548498 and 2156548507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176747 + ... + 188553.

It is an arithmetic number, because the mean of its divisors is an integer number (90322344).

Almost surely, 2^2156548550 is an apocalyptic number.

2156548550 is an abundant number, since it is smaller than the sum of its proper divisors (2178923962).

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

2156548550 is a wasteful number, since it uses less digits than its factorization.

2156548550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12113 (or 12108 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 41.

The square root of 2156548550 is about 46438.6536195872. The cubic root of 2156548550 is about 1291.9719355251.

The spelling of 2156548550 in words is "two billion, one hundred fifty-six million, five hundred forty-eight thousand, five hundred fifty".