2161575273 has 16 divisors (see below), whose sum is σ = 3385964736. Its totient is φ = 1209272640.

The previous prime is 2161575263. The next prime is 2161575281. The reversal of 2161575273 is 3725751612.

It is a happy number.

It is not a de Polignac number, because 2161575273 - 2⁶ = 2161575209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2161575203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2518890 + ... + 2519747.

It is an arithmetic number, because the mean of its divisors is an integer number (211622796).

Almost surely, 2^2161575273 is an apocalyptic number.

It is an amenable number.

2161575273 is a deficient number, since it is larger than the sum of its proper divisors (1224389463).

2161575273 is a wasteful number, since it uses less digits than its factorization.

2161575273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5038664.

The product of its digits is 88200, while the sum is 39.

The square root of 2161575273 is about 46492.7443048913. The cubic root of 2161575273 is about 1292.9749805100.

The spelling of 2161575273 in words is "two billion, one hundred sixty-one million, five hundred seventy-five thousand, two hundred seventy-three".