55324013 has 4 divisors (see below), whose sum is σ = 55339068. Its totient is φ = 55308960.

The previous prime is 55324007. The next prime is 55324019. The reversal of 55324013 is 31042355.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31042355 = 5 ⋅6208471.

It is an interprime number because it is at equal distance from previous prime (55324007) and next prime (55324019).

It can be written as a sum of positive squares in 2 ways, for example, as 45670564 + 9653449 = 6758^2 + 3107^2 .

It is a cyclic number.

It is not a de Polignac number, because 55324013 - 2⁶ = 55323949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55324013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55324019) 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, 2033 + ... + 10713.

It is an arithmetic number, because the mean of its divisors is an integer number (13834767).

Almost surely, 2^55324013 is an apocalyptic number.

It is an amenable number.

55324013 is a deficient number, since it is larger than the sum of its proper divisors (15055).

55324013 is an equidigital number, since it uses as much as digits as its factorization.

55324013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15054.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 55324013 is about 7438.0113605721. The cubic root of 55324013 is about 381.0405759079.

Adding to 55324013 its reverse (31042355), we get a palindrome (86366368).

The spelling of 55324013 in words is "fifty-five million, three hundred twenty-four thousand, thirteen".