55511313 has 32 divisors (see below), whose sum is σ = 88058880. Its totient is φ = 30661440.

The previous prime is 55511311. The next prime is 55511321. The reversal of 55511313 is 31311555.

It is not a de Polignac number, because 55511313 - 2¹ = 55511311 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55511311) 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 31 ways as a sum of consecutive naturals, for example, 34828 + ... + 36386.

It is an arithmetic number, because the mean of its divisors is an integer number (2751840).

Almost surely, 2^55511313 is an apocalyptic number.

It is an amenable number.

55511313 is a deficient number, since it is larger than the sum of its proper divisors (32547567).

55511313 is a wasteful number, since it uses less digits than its factorization.

55511313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669.

The product of its digits is 1125, while the sum is 24.

The square root of 55511313 is about 7450.5914530324. The cubic root of 55511313 is about 381.4700971176.

Adding to 55511313 its reverse (31311555), we get a palindrome (86822868).

The spelling of 55511313 in words is "fifty-five million, five hundred eleven thousand, three hundred thirteen".