553801321 has 4 divisors (see below), whose sum is σ = 558028944. Its totient is φ = 549573700.

The previous prime is 553801319. The next prime is 553801327. The reversal of 553801321 is 123108355.

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 553801321 - 2¹ = 553801319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 553801321.

It is not an unprimeable number, because it can be changed into a prime (553801327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2113615 + ... + 2113876.

It is an arithmetic number, because the mean of its divisors is an integer number (139507236).

Almost surely, 2^553801321 is an apocalyptic number.

It is an amenable number.

553801321 is a deficient number, since it is larger than the sum of its proper divisors (4227623).

553801321 is a wasteful number, since it uses less digits than its factorization.

553801321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4227622.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 553801321 is about 23532.9836824828. The cubic root of 553801321 is about 821.2045162296.

Adding to 553801321 its reverse (123108355), we get a palindrome (676909676).

The spelling of 553801321 in words is "five hundred fifty-three million, eight hundred one thousand, three hundred twenty-one".