55321313 has 4 divisors (see below), whose sum is σ = 55518468. Its totient is φ = 55124160.

The previous prime is 55321307. The next prime is 55321319. The reversal of 55321313 is 31312355.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (55321307) and next prime (55321319).

It can be written as a sum of positive squares in 2 ways, for example, as 39225169 + 16096144 = 6263^2 + 4012^2 .

It is a cyclic number.

It is not a de Polignac number, because 55321313 - 2¹² = 55317217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55321319) 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, 98156 + ... + 98717.

It is an arithmetic number, because the mean of its divisors is an integer number (13879617).

Almost surely, 2^55321313 is an apocalyptic number.

It is an amenable number.

55321313 is a deficient number, since it is larger than the sum of its proper divisors (197155).

55321313 is a wasteful number, since it uses less digits than its factorization.

55321313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197154.

The product of its digits is 1350, while the sum is 23.

The square root of 55321313 is about 7437.8298582315. The cubic root of 55321313 is about 381.0343771150.

Adding to 55321313 its reverse (31312355), we get a palindrome (86633668).

The spelling of 55321313 in words is "fifty-five million, three hundred twenty-one thousand, three hundred thirteen".