2156210007 has 16 divisors (see below), whose sum is σ = 3288929280. Its totient is φ = 1230891552.

The previous prime is 2156209997. The next prime is 2156210029. The reversal of 2156210007 is 7000126512.

It is not a de Polignac number, because 2156210007 - 2¹⁵ = 2156177239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156210057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29407 + ... + 71952.

It is an arithmetic number, because the mean of its divisors is an integer number (205558080).

Almost surely, 2^2156210007 is an apocalyptic number.

2156210007 is a deficient number, since it is larger than the sum of its proper divisors (1132719273).

2156210007 is a wasteful number, since it uses less digits than its factorization.

2156210007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102382.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 2156210007 is about 46435.0084203718. The cubic root of 2156210007 is about 1291.9043258030.

Adding to 2156210007 its reverse (7000126512), we get a palindrome (9156336519).

The spelling of 2156210007 in words is "two billion, one hundred fifty-six million, two hundred ten thousand, seven".