2156177135 has 24 divisors (see below), whose sum is σ = 3015331920. Its totient is φ = 1475827584.

The previous prime is 2156177119. The next prime is 2156177137. The reversal of 2156177135 is 5317716512.

It is not a de Polignac number, because 2156177135 - 2⁴ = 2156177119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156177137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131672 + ... + 147138.

It is an arithmetic number, because the mean of its divisors is an integer number (125638830).

Almost surely, 2^2156177135 is an apocalyptic number.

2156177135 is a deficient number, since it is larger than the sum of its proper divisors (859154785).

2156177135 is a wasteful number, since it uses less digits than its factorization.

2156177135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16055 (or 16048 counting only the distinct ones).

The product of its digits is 44100, while the sum is 38.

The square root of 2156177135 is about 46434.6544619425. The cubic root of 2156177135 is about 1291.8977606270.

The spelling of 2156177135 in words is "two billion, one hundred fifty-six million, one hundred seventy-seven thousand, one hundred thirty-five".