55500013 has 4 divisors (see below), whose sum is σ = 57290368. Its totient is φ = 53709660.

The previous prime is 55499993. The next prime is 55500031. The reversal of 55500013 is 31000555.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31000555 = 5 ⋅6200111.

It is a cyclic number.

It is not a de Polignac number, because 55500013 - 2⁹ = 55499501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55500413) 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 in 3 ways as a sum of consecutive naturals, for example, 895131 + ... + 895192.

It is an arithmetic number, because the mean of its divisors is an integer number (14322592).

Almost surely, 2^55500013 is an apocalyptic number.

It is an amenable number.

55500013 is a deficient number, since it is larger than the sum of its proper divisors (1790355).

55500013 is a wasteful number, since it uses less digits than its factorization.

55500013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790354.

The product of its (nonzero) digits is 375, while the sum is 19.

The square root of 55500013 is about 7449.8330853785. The cubic root of 55500013 is about 381.4442110751. Note that the first 3 decimals are identical.

Adding to 55500013 its reverse (31000555), we get a palindrome (86500568).

The spelling of 55500013 in words is "fifty-five million, five hundred thousand, thirteen".