321340453 has 4 divisors (see below), whose sum is σ = 367246240. Its totient is φ = 275434668.

The previous prime is 321340441. The next prime is 321340469. The reversal of 321340453 is 354043123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 321340453 - 2¹⁷ = 321209381 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 (321340423) 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, 22952883 + ... + 22952896.

It is an arithmetic number, because the mean of its divisors is an integer number (91811560).

Almost surely, 2^321340453 is an apocalyptic number.

It is an amenable number.

321340453 is a deficient number, since it is larger than the sum of its proper divisors (45905787).

321340453 is an equidigital number, since it uses as much as digits as its factorization.

321340453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45905786.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 321340453 is about 17925.9714660043. The cubic root of 321340453 is about 684.9441075393.

Adding to 321340453 its reverse (354043123), we get a palindrome (675383576).

The spelling of 321340453 in words is "three hundred twenty-one million, three hundred forty thousand, four hundred fifty-three".