319530421 has 24 divisors (see below), whose sum is σ = 389880000. Its totient is φ = 260612352.

The previous prime is 319530397. The next prime is 319530427. The reversal of 319530421 is 124035913.

It is not a de Polignac number, because 319530421 - 2⁷ = 319530293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 319530421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319530427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255205 + ... + 256453.

It is an arithmetic number, because the mean of its divisors is an integer number (16245000).

Almost surely, 2^319530421 is an apocalyptic number.

It is an amenable number.

319530421 is a deficient number, since it is larger than the sum of its proper divisors (70349579).

319530421 is a wasteful number, since it uses less digits than its factorization.

319530421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513 (or 1506 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 319530421 is about 17875.4138693346. The cubic root of 319530421 is about 683.6556445525.

The spelling of 319530421 in words is "three hundred nineteen million, five hundred thirty thousand, four hundred twenty-one".