55805313 has 4 divisors (see below), whose sum is σ = 74407088. Its totient is φ = 37203540.

The previous prime is 55805293. The next prime is 55805329. The reversal of 55805313 is 31350855.

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 not a de Polignac number, because 55805313 - 2⁶ = 55805249 is a prime.

It is a super-2 number, since 2×55805313² = 6228465918055938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55805333) 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 3 ways as a sum of consecutive naturals, for example, 9300883 + ... + 9300888.

It is an arithmetic number, because the mean of its divisors is an integer number (18601772).

Almost surely, 2^55805313 is an apocalyptic number.

It is an amenable number.

55805313 is a deficient number, since it is larger than the sum of its proper divisors (18601775).

55805313 is a wasteful number, since it uses less digits than its factorization.

55805313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18601774.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 55805313 is about 7470.2953756863. The cubic root of 55805313 is about 382.1423612553.

The spelling of 55805313 in words is "fifty-five million, eight hundred five thousand, three hundred thirteen".