2172640473 has 24 divisors (see below), whose sum is σ = 3269884800. Its totient is φ = 1388397024.

The previous prime is 2172640447. The next prime is 2172640523. The reversal of 2172640473 is 3740462712.

2172640473 is a `hidden beast` number, since 2 + 1 + 7 + 2 + 640 + 4 + 7 + 3 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-2172640473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2172640573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6336 + ... + 66222.

It is an arithmetic number, because the mean of its divisors is an integer number (136245200).

Almost surely, 2^2172640473 is an apocalyptic number.

It is an amenable number.

2172640473 is a deficient number, since it is larger than the sum of its proper divisors (1097244327).

2172640473 is a wasteful number, since it uses less digits than its factorization.

2172640473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60061 (or 60058 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 2172640473 is about 46611.5916162493. The cubic root of 2172640473 is about 1295.1774920079.

The spelling of 2172640473 in words is "two billion, one hundred seventy-two million, six hundred forty thousand, four hundred seventy-three".