313234431421 has 4 divisors (see below), whose sum is σ = 320874295644. Its totient is φ = 305594567200.

The previous prime is 313234431373. The next prime is 313234431443. The reversal of 313234431421 is 124134432313.

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

It can be written as a sum of positive squares in 2 ways, for example, as 112167387396 + 201067044025 = 334914^2 + 448405^2 .

It is a cyclic number.

It is not a de Polignac number, because 313234431421 - 2²⁹ = 312697560509 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 (313231431421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3819932050 + ... + 3819932131.

It is an arithmetic number, because the mean of its divisors is an integer number (80218573911).

Almost surely, 2^313234431421 is an apocalyptic number.

It is an amenable number.

313234431421 is a deficient number, since it is larger than the sum of its proper divisors (7639864223).

313234431421 is an equidigital number, since it uses as much as digits as its factorization.

313234431421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7639864222.

The product of its digits is 20736, while the sum is 31.

Adding to 313234431421 its reverse (124134432313), we get a palindrome (437368863734).

The spelling of 313234431421 in words is "three hundred thirteen billion, two hundred thirty-four million, four hundred thirty-one thousand, four hundred twenty-one".