55783313 has 4 divisors (see below), whose sum is σ = 56970240. Its totient is φ = 54596388.

The previous prime is 55783289. The next prime is 55783319. The reversal of 55783313 is 31338755.

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 a cyclic number.

It is not a de Polignac number, because 55783313 - 2²⁰ = 54734737 is a prime.

It is a super-2 number, since 2×55783313² = 6223556018511938, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55783319) 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, 593393 + ... + 593486.

It is an arithmetic number, because the mean of its divisors is an integer number (14242560).

Almost surely, 2^55783313 is an apocalyptic number.

It is an amenable number.

55783313 is a deficient number, since it is larger than the sum of its proper divisors (1186927).

55783313 is a wasteful number, since it uses less digits than its factorization.

55783313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186926.

The product of its digits is 37800, while the sum is 35.

The square root of 55783313 is about 7468.8227318634. The cubic root of 55783313 is about 382.0921376206.

The spelling of 55783313 in words is "fifty-five million, seven hundred eighty-three thousand, three hundred thirteen".