319358421 has 12 divisors (see below), whose sum is σ = 463278348. Its totient is φ = 211990464.

The previous prime is 319358407. The next prime is 319358423. The reversal of 319358421 is 124853913.

It can be written as a sum of positive squares in 2 ways, for example, as 154107396 + 165251025 = 12414^2 + 12855^2 .

It is not a de Polignac number, because 319358421 - 2⁶ = 319358357 is a prime.

It is a super-2 number, since 2×319358421² = 203979602127226482, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319358423) 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, 74050 + ... + 78243.

It is an arithmetic number, because the mean of its divisors is an integer number (38606529).

Almost surely, 2^319358421 is an apocalyptic number.

It is an amenable number.

319358421 is a deficient number, since it is larger than the sum of its proper divisors (143919927).

319358421 is a wasteful number, since it uses less digits than its factorization.

319358421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152532 (or 152529 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 319358421 is about 17870.6021443039. The cubic root of 319358421 is about 683.5329542249.

The spelling of 319358421 in words is "three hundred nineteen million, three hundred fifty-eight thousand, four hundred twenty-one".