2172155136 has 36 divisors (see below), whose sum is σ = 5781102432. Its totient is φ = 724051456.

The previous prime is 2172155123. The next prime is 2172155137. The reversal of 2172155136 is 6315512712.

It is a junction number, because it is equal to n+sod(n) for n = 2172155097 and 2172155106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172155137) 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 3 ways as a sum of consecutive naturals, for example, 1413396 + ... + 1414931.

Almost surely, 2^2172155136 is an apocalyptic number.

It is an amenable number.

2172155136 is an abundant number, since it is smaller than the sum of its proper divisors (3608947296).

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

2172155136 is an equidigital number, since it uses as much as digits as its factorization.

2172155136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828346 (or 2828332 counting only the distinct ones).

The product of its digits is 12600, while the sum is 33.

The square root of 2172155136 is about 46606.3851419524. The cubic root of 2172155136 is about 1295.0810434117.

Adding to 2172155136 its reverse (6315512712), we get a palindrome (8487667848).

The spelling of 2172155136 in words is "two billion, one hundred seventy-two million, one hundred fifty-five thousand, one hundred thirty-six".