55122313 has 8 divisors (see below), whose sum is σ = 58528008. Its totient is φ = 51734784.

The previous prime is 55122293. The next prime is 55122317. The reversal of 55122313 is 31322155.

It can be written as a sum of positive squares in 4 ways, for example, as 4313929 + 50808384 = 2077^2 + 7128^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55122313 - 2¹³ = 55114121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55122317) 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 7 ways as a sum of consecutive naturals, for example, 1995 + ... + 10687.

It is an arithmetic number, because the mean of its divisors is an integer number (7316001).

Almost surely, 2^55122313 is an apocalyptic number.

It is an amenable number.

55122313 is a deficient number, since it is larger than the sum of its proper divisors (3405695).

55122313 is a wasteful number, since it uses less digits than its factorization.

55122313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9083.

The product of its digits is 900, while the sum is 22.

The square root of 55122313 is about 7424.4402482611. The cubic root of 55122313 is about 380.5769467657.

Adding to 55122313 its reverse (31322155), we get a palindrome (86444468).

The spelling of 55122313 in words is "fifty-five million, one hundred twenty-two thousand, three hundred thirteen".