553996321 has 2 divisors, whose sum is σ = 553996322. Its totient is φ = 553996320.

The previous prime is 553996307. The next prime is 553996349. The reversal of 553996321 is 123699355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 387302400 + 166693921 = 19680^2 + 12911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-553996321 is a prime.

It is not a weakly prime, because it can be changed into another prime (553996361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276998160 + 276998161.

It is an arithmetic number, because the mean of its divisors is an integer number (276998161).

Almost surely, 2^553996321 is an apocalyptic number.

It is an amenable number.

553996321 is a deficient number, since it is larger than the sum of its proper divisors (1).

553996321 is an equidigital number, since it uses as much as digits as its factorization.

553996321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 218700, while the sum is 43.

The square root of 553996321 is about 23537.1264388837. The cubic root of 553996321 is about 821.3008901957.

The spelling of 553996321 in words is "five hundred fifty-three million, nine hundred ninety-six thousand, three hundred twenty-one".