2175533680 has 20 divisors (see below), whose sum is σ = 5058115992. Its totient is φ = 870213440.

The previous prime is 2175533669. The next prime is 2175533693. The reversal of 2175533680 is 863355712.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13597006 + ... + 13597165.

Almost surely, 2^2175533680 is an apocalyptic number.

2175533680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2175533680 is an abundant number, since it is smaller than the sum of its proper divisors (2882582312).

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

2175533680 is a wasteful number, since it uses less digits than its factorization.

2175533680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27194184 (or 27194178 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 2175533680 is about 46642.6165646826. The cubic root of 2175533680 is about 1295.7521467547.

The spelling of 2175533680 in words is "two billion, one hundred seventy-five million, five hundred thirty-three thousand, six hundred eighty".