2181495273 has 8 divisors (see below), whose sum is σ = 2916139200. Its totient is φ = 1450590768.

The previous prime is 2181495229. The next prime is 2181495299. The reversal of 2181495273 is 3725941812.

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

It is not a de Polignac number, because 2181495273 - 2⁹ = 2181494761 is a prime.

It is a super-2 number, since 2×2181495273² = 9517843252242689058, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2181495223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 933493 + ... + 935826.

It is an arithmetic number, because the mean of its divisors is an integer number (364517400).

Almost surely, 2^2181495273 is an apocalyptic number.

It is an amenable number.

2181495273 is a deficient number, since it is larger than the sum of its proper divisors (734643927).

2181495273 is a wasteful number, since it uses less digits than its factorization.

2181495273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869711.

The product of its digits is 120960, while the sum is 42.

The square root of 2181495273 is about 46706.4799893976. The cubic root of 2181495273 is about 1296.9346461273.

The spelling of 2181495273 in words is "two billion, one hundred eighty-one million, four hundred ninety-five thousand, two hundred seventy-three".