313440421 has 8 divisors (see below), whose sum is σ = 358561280. Its totient is φ = 268405488.

The previous prime is 313440403. The next prime is 313440427. The reversal of 313440421 is 124044313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 313440421 - 2²¹ = 311343269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 313440392 and 313440401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313440427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13461 + ... + 28426.

It is an arithmetic number, because the mean of its divisors is an integer number (44820160).

Almost surely, 2^313440421 is an apocalyptic number.

It is an amenable number.

313440421 is a deficient number, since it is larger than the sum of its proper divisors (45120859).

313440421 is a wasteful number, since it uses less digits than its factorization.

313440421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42963.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 313440421 is about 17704.2486708699. The cubic root of 313440421 is about 679.2844412029.

Adding to 313440421 its reverse (124044313), we get a palindrome (437484734).

The spelling of 313440421 in words is "three hundred thirteen million, four hundred forty thousand, four hundred twenty-one".