305213423 has 4 divisors (see below), whose sum is σ = 305264520. Its totient is φ = 305162328.

The previous prime is 305213401. The next prime is 305213449. The reversal of 305213423 is 324312503.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 305213423 - 2¹⁰ = 305212399 is a prime.

It is a super-3 number, since 3×305213423³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305213123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15188 + ... + 29001.

It is an arithmetic number, because the mean of its divisors is an integer number (76316130).

Almost surely, 2^305213423 is an apocalyptic number.

305213423 is a deficient number, since it is larger than the sum of its proper divisors (51097).

305213423 is an equidigital number, since it uses as much as digits as its factorization.

305213423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51096.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 305213423 is about 17470.3584107482. The cubic root of 305213423 is about 673.2885205011.

Adding to 305213423 its reverse (324312503), we get a palindrome (629525926).

The spelling of 305213423 in words is "three hundred five million, two hundred thirteen thousand, four hundred twenty-three".