313225421 has 4 divisors (see below), whose sum is σ = 313261500. Its totient is φ = 313189344.

The previous prime is 313225417. The next prime is 313225439. The reversal of 313225421 is 124522313.

313225421 = 12514² + 12515².

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 156600196 + 156625225 = 12514^2 + 12515^2 .

It is a cyclic number.

It is not a de Polignac number, because 313225421 - 2² = 313225417 is a prime.

It is a super-2 number, since 2×313225421² = 196220328721254482, which contains 22 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 (313225411) 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, 3785 + ... + 25313.

It is an arithmetic number, because the mean of its divisors is an integer number (78315375).

Almost surely, 2^313225421 is an apocalyptic number.

313225421 is the 12515-th centered square number.

It is an amenable number.

313225421 is a deficient number, since it is larger than the sum of its proper divisors (36079).

313225421 is a wasteful number, since it uses less digits than its factorization.

313225421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36078.

The product of its digits is 1440, while the sum is 23.

The square root of 313225421 is about 17698.1756404438. The cubic root of 313225421 is about 679.1290905093.

Adding to 313225421 its reverse (124522313), we get a palindrome (437747734).

The spelling of 313225421 in words is "three hundred thirteen million, two hundred twenty-five thousand, four hundred twenty-one".