2156231080 has 16 divisors (see below), whose sum is σ = 4851520020. Its totient is φ = 862492416.

The previous prime is 2156231059. The next prime is 2156231167. The reversal of 2156231080 is 801326512.

It can be written as a sum of positive squares in 2 ways, for example, as 2144245636 + 11985444 = 46306^2 + 3462^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26952849 + ... + 26952928.

Almost surely, 2^2156231080 is an apocalyptic number.

2156231080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2156231080 is an abundant number, since it is smaller than the sum of its proper divisors (2695288940).

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

2156231080 is a wasteful number, since it uses less digits than its factorization.

2156231080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53905788 (or 53905784 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2156231080 is about 46435.2353283581. The cubic root of 2156231080 is about 1291.9085344548.

Adding to 2156231080 its reverse (801326512), we get a palindrome (2957557592).

The spelling of 2156231080 in words is "two billion, one hundred fifty-six million, two hundred thirty-one thousand, eighty".