55320113 has 4 divisors (see below), whose sum is σ = 55455780. Its totient is φ = 55184448.

The previous prime is 55320101. The next prime is 55320131. The reversal of 55320113 is 31102355.

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 43983424 + 11336689 = 6632^2 + 3367^2 .

It is a cyclic number.

It is not a de Polignac number, because 55320113 - 2¹⁸ = 55057969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55320173) 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, 67220 + ... + 68037.

It is an arithmetic number, because the mean of its divisors is an integer number (13863945).

Almost surely, 2^55320113 is an apocalyptic number.

It is an amenable number.

55320113 is a deficient number, since it is larger than the sum of its proper divisors (135667).

55320113 is a wasteful number, since it uses less digits than its factorization.

55320113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135666.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 55320113 is about 7437.7491891028. The cubic root of 55320113 is about 381.0316220312.

Adding to 55320113 its reverse (31102355), we get a palindrome (86422468).

The spelling of 55320113 in words is "fifty-five million, three hundred twenty thousand, one hundred thirteen".