2172938616522 has 48 divisors (see below), whose sum is σ = 4860839273472. Its totient is φ = 701082527040.

The previous prime is 2172938616521. The next prime is 2172938616547. The reversal of 2172938616522 is 2256168392712.

2172938616522 is a `hidden beast` number, since 2 + 1 + 7 + 29 + 3 + 86 + 16 + 522 = 666.

It is not an unprimeable number, because it can be changed into a prime (2172938616521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11498248 + ... + 11685699.

It is an arithmetic number, because the mean of its divisors is an integer number (101267484864).

Almost surely, 2^{2172938616522} is an apocalyptic number.

2172938616522 is an abundant number, since it is smaller than the sum of its proper divisors (2687900656950).

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

2172938616522 is a wasteful number, since it uses less digits than its factorization.

2172938616522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23184123 (or 23184120 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 2172938616522 in words is "two trillion, one hundred seventy-two billion, nine hundred thirty-eight million, six hundred sixteen thousand, five hundred twenty-two".