2172012072 has 64 divisors (see below), whose sum is σ = 5947732800. Its totient is φ = 657914880.

The previous prime is 2172012071. The next prime is 2172012079. The reversal of 2172012072 is 2702102712.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (2172012071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79954 + ... + 103617.

It is an arithmetic number, because the mean of its divisors is an integer number (92933325).

Almost surely, 2^2172012072 is an apocalyptic number.

It is an amenable number.

2172012072 is an abundant number, since it is smaller than the sum of its proper divisors (3775720728).

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

2172012072 is a wasteful number, since it uses less digits than its factorization.

2172012072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183626 (or 183622 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 2172012072 is about 46604.8503055208. The cubic root of 2172012072 is about 1295.0526102765.

Adding to 2172012072 its reverse (2702102712), we get a palindrome (4874114784).

The spelling of 2172012072 in words is "two billion, one hundred seventy-two million, twelve thousand, seventy-two".