2156211246 has 32 divisors (see below), whose sum is σ = 4931700480. Its totient is φ = 615658176.

The previous prime is 2156211241. The next prime is 2156211259. The reversal of 2156211246 is 6421126512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156211241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51625 + ... + 83531.

It is an arithmetic number, because the mean of its divisors is an integer number (154115640).

Almost surely, 2^2156211246 is an apocalyptic number.

2156211246 is an abundant number, since it is smaller than the sum of its proper divisors (2775489234).

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

2156211246 is a wasteful number, since it uses less digits than its factorization.

2156211246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33528.

The product of its digits is 5760, while the sum is 30.

The square root of 2156211246 is about 46435.0217615971. The cubic root of 2156211246 is about 1291.9045732540.

Adding to 2156211246 its reverse (6421126512), we get a palindrome (8577337758).

The spelling of 2156211246 in words is "two billion, one hundred fifty-six million, two hundred eleven thousand, two hundred forty-six".