2131156788 has 24 divisors (see below), whose sum is σ = 5265211392. Its totient is φ = 668598144.

The previous prime is 2131156787. The next prime is 2131156801. The reversal of 2131156788 is 8876511312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131156787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5223220 + ... + 5223627.

It is an arithmetic number, because the mean of its divisors is an integer number (219383808).

Almost surely, 2^2131156788 is an apocalyptic number.

It is an amenable number.

2131156788 is an abundant number, since it is smaller than the sum of its proper divisors (3134054604).

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

2131156788 is a wasteful number, since it uses less digits than its factorization.

2131156788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10446871 (or 10446869 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 2131156788 is about 46164.4537279496. The cubic root of 2131156788 is about 1286.8812322897.

The spelling of 2131156788 in words is "two billion, one hundred thirty-one million, one hundred fifty-six thousand, seven hundred eighty-eight".