273343021 has 6 divisors (see below), whose sum is σ = 317970510. Its totient is φ = 234293976.

The previous prime is 273342973. The next prime is 273343043. The reversal of 273343021 is 120343372.

It can be written as a sum of positive squares in only one way, i.e., 205922500 + 67420521 = 14350^2 + 8211^2 .

It is a de Polignac number, because none of the positive numbers 2^k-273343021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (273343061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2789166 + ... + 2789263.

It is an arithmetic number, because the mean of its divisors is an integer number (52995085).

Almost surely, 2^273343021 is an apocalyptic number.

It is an amenable number.

273343021 is a deficient number, since it is larger than the sum of its proper divisors (44627489).

273343021 is an equidigital number, since it uses as much as digits as its factorization.

273343021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5578443 (or 5578436 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 273343021 is about 16533.0886709048. The cubic root of 273343021 is about 648.9869988208.

Adding to 273343021 its reverse (120343372), we get a palindrome (393686393).

It can be divided in two parts, 2733 and 43021, that added together give a palindrome (45754).

The spelling of 273343021 in words is "two hundred seventy-three million, three hundred forty-three thousand, twenty-one".