2156720106 has 16 divisors (see below), whose sum is σ = 4313900448. Its totient is φ = 718830000.

The previous prime is 2156720101. The next prime is 2156720117. The reversal of 2156720106 is 6010276512.

2156720106 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2156720101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86781 + ... + 108831.

It is an arithmetic number, because the mean of its divisors is an integer number (269618778).

Almost surely, 2^2156720106 is an apocalyptic number.

2156720106 is an abundant number, since it is smaller than the sum of its proper divisors (2157180342).

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

2156720106 is a wasteful number, since it uses less digits than its factorization.

2156720106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38357.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 2156720106 is about 46440.5007078950. The cubic root of 2156720106 is about 1292.0061939177.

Adding to 2156720106 its reverse (6010276512), we get a palindrome (8166996618).

The spelling of 2156720106 in words is "two billion, one hundred fifty-six million, seven hundred twenty thousand, one hundred six".