2172477905 has 8 divisors (see below), whose sum is σ = 2807509992. Its totient is φ = 1604291328.

The previous prime is 2172477893. The next prime is 2172477941. The reversal of 2172477905 is 5097742712.

It can be written as a sum of positive squares in 4 ways, for example, as 417957136 + 1754520769 = 20444^2 + 41887^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2172477905 - 2¹⁴ = 2172461521 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16711304 + ... + 16711433.

It is an arithmetic number, because the mean of its divisors is an integer number (350938749).

Almost surely, 2^2172477905 is an apocalyptic number.

It is an amenable number.

2172477905 is a deficient number, since it is larger than the sum of its proper divisors (635032087).

2172477905 is a wasteful number, since it uses less digits than its factorization.

2172477905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33422755.

The product of its (nonzero) digits is 246960, while the sum is 44.

The square root of 2172477905 is about 46609.8477255612. The cubic root of 2172477905 is about 1295.1451872818.

The spelling of 2172477905 in words is "two billion, one hundred seventy-two million, four hundred seventy-seven thousand, nine hundred five".