55512313 has 4 divisors (see below), whose sum is σ = 55528180. Its totient is φ = 55496448.

The previous prime is 55512299. The next prime is 55512329. The reversal of 55512313 is 31321555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31321555 = 5 ⋅6264311.

It can be written as a sum of positive squares in 2 ways, for example, as 30382144 + 25130169 = 5512^2 + 5013^2 .

It is a cyclic number.

It is not a de Polignac number, because 55512313 - 2¹³ = 55504121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55510313) 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, 120 + ... + 10537.

It is an arithmetic number, because the mean of its divisors is an integer number (13882045).

Almost surely, 2^55512313 is an apocalyptic number.

It is an amenable number.

55512313 is a deficient number, since it is larger than the sum of its proper divisors (15867).

55512313 is a wasteful number, since it uses less digits than its factorization.

55512313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15866.

The product of its digits is 2250, while the sum is 25.

The square root of 55512313 is about 7450.6585614964. The cubic root of 55512313 is about 381.4723877486.

Adding to 55512313 its reverse (31321555), we get a palindrome (86833868).

The spelling of 55512313 in words is "fifty-five million, five hundred twelve thousand, three hundred thirteen".