2156042156 has 6 divisors (see below), whose sum is σ = 3773073780. Its totient is φ = 1078021076.

The previous prime is 2156042131. The next prime is 2156042159. The reversal of 2156042156 is 6512406512.

It is not an unprimeable number, because it can be changed into a prime (2156042159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269505266 + ... + 269505273.

It is an arithmetic number, because the mean of its divisors is an integer number (628845630).

Almost surely, 2^2156042156 is an apocalyptic number.

It is an amenable number.

2156042156 is a deficient number, since it is larger than the sum of its proper divisors (1617031624).

2156042156 is a wasteful number, since it uses less digits than its factorization.

2156042156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539010543 (or 539010541 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2156042156 is about 46433.2010096224. The cubic root of 2156042156 is about 1291.8708020029.

Adding to 2156042156 its reverse (6512406512), we get a palindrome (8668448668).

The spelling of 2156042156 in words is "two billion, one hundred fifty-six million, forty-two thousand, one hundred fifty-six".