321544407047453 has 4 divisors (see below), whose sum is σ = 321544679943900. Its totient is φ = 321544134151008.

The previous prime is 321544407047401. The next prime is 321544407047459. The reversal of 321544407047453 is 354740704445123.

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 197150046066169 + 124394360981284 = 14041013^2 + 11153222^2 .

It is a cyclic number.

It is not a de Polignac number, because 321544407047453 - 2⁶ = 321544407047389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321544407047395 and 321544407047404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321544407047459) 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, 134673128 + ... + 137039921.

It is an arithmetic number, because the mean of its divisors is an integer number (80386169985975).

Almost surely, 2^{321544407047453} is an apocalyptic number.

It is an amenable number.

321544407047453 is a deficient number, since it is larger than the sum of its proper divisors (272896447).

321544407047453 is a wasteful number, since it uses less digits than its factorization.

321544407047453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272896446.

The product of its (nonzero) digits is 22579200, while the sum is 53.

The spelling of 321544407047453 in words is "three hundred twenty-one trillion, five hundred forty-four billion, four hundred seven million, forty-seven thousand, four hundred fifty-three".