55488013 has 4 divisors (see below), whose sum is σ = 63414880. Its totient is φ = 47561148.

The previous prime is 55488007. The next prime is 55488019. The reversal of 55488013 is 31088455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (55488007) and next prime (55488019).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55488013 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 55488013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55488019) 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, 3963423 + ... + 3963436.

It is an arithmetic number, because the mean of its divisors is an integer number (15853720).

Almost surely, 2^55488013 is an apocalyptic number.

It is an amenable number.

55488013 is a deficient number, since it is larger than the sum of its proper divisors (7926867).

55488013 is an equidigital number, since it uses as much as digits as its factorization.

55488013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7926866.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 55488013 is about 7449.0276546674. The cubic root of 55488013 is about 381.4167176252.

The spelling of 55488013 in words is "fifty-five million, four hundred eighty-eight thousand, thirteen".