2149021273 has 12 divisors (see below), whose sum is σ = 2560857012. Its totient is φ = 1797089280.

The previous prime is 2149021271. The next prime is 2149021331. The reversal of 2149021273 is 3721209412.

It can be written as a sum of positive squares in 2 ways, for example, as 696801609 + 1452219664 = 26397^2 + 38108^2 .

It is not a de Polignac number, because 2149021273 - 2¹ = 2149021271 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2149021271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 532840 + ... + 536857.

It is an arithmetic number, because the mean of its divisors is an integer number (213404751).

Almost surely, 2^2149021273 is an apocalyptic number.

It is an amenable number.

2149021273 is a deficient number, since it is larger than the sum of its proper divisors (411835739).

2149021273 is a wasteful number, since it uses less digits than its factorization.

2149021273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069752 (or 1069745 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 2149021273 is about 46357.5373914534. The cubic root of 2149021273 is about 1290.4670049628.

The spelling of 2149021273 in words is "two billion, one hundred forty-nine million, twenty-one thousand, two hundred seventy-three".