55162813 has 2 divisors, whose sum is σ = 55162814. Its totient is φ = 55162812.

The previous prime is 55162787. The next prime is 55162837. The reversal of 55162813 is 31826155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55086084 + 76729 = 7422^2 + 277^2 .

It is a cyclic number.

It is not a de Polignac number, because 55162813 - 2⁵ = 55162781 is a prime.

It is equal to p_3291376 and since 55162813 and 3291376 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55162853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27581406 + 27581407.

It is an arithmetic number, because the mean of its divisors is an integer number (27581407).

Almost surely, 2^55162813 is an apocalyptic number.

It is an amenable number.

55162813 is a deficient number, since it is larger than the sum of its proper divisors (1).

55162813 is an equidigital number, since it uses as much as digits as its factorization.

55162813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 31.

The square root of 55162813 is about 7427.1672258002. The cubic root of 55162813 is about 380.6701310086.

Adding to 55162813 its reverse (31826155), we get a palindrome (86988968).

The spelling of 55162813 in words is "fifty-five million, one hundred sixty-two thousand, eight hundred thirteen".