2180049481 has 3 divisors (see below), whose sum is σ = 2180096173. Its totient is φ = 2180002790.

The previous prime is 2180049479. The next prime is 2180049491. The reversal of 2180049481 is 1849400812.

The square root of 2180049481 is 46691.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2180049481 - 2¹ = 2180049479 is a prime.

It is a super-2 number, since 2×2180049481² = 9505231479216738722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2180049481.

It is not an unprimeable number, because it can be changed into a prime (2180049401) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 23346 + ... + 70036.

Almost surely, 2^2180049481 is an apocalyptic number.

2180049481 is the 46691-st square number.

2180049481 is the 23346-th centered octagonal number.

It is an amenable number.

2180049481 is a deficient number, since it is larger than the sum of its proper divisors (46692).

2180049481 is an frugal number, since it uses more digits than its factorization.

2180049481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93382 (or 46691 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The cubic root of 2180049481 is about 1296.6480671381.

The spelling of 2180049481 in words is "two billion, one hundred eighty million, forty-nine thousand, four hundred eighty-one".