55310561 has 4 divisors (see below), whose sum is σ = 57715392. Its totient is φ = 52905732.

The previous prime is 55310551. The next prime is 55310573. The reversal of 55310561 is 16501355.

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 55310561 - 2¹⁰ = 55309537 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 55310561.

It is not an unprimeable number, because it can be changed into a prime (55310531) 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, 1202381 + ... + 1202426.

It is an arithmetic number, because the mean of its divisors is an integer number (14428848).

Almost surely, 2^55310561 is an apocalyptic number.

It is an amenable number.

55310561 is a deficient number, since it is larger than the sum of its proper divisors (2404831).

55310561 is a wasteful number, since it uses less digits than its factorization.

55310561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404830.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 55310561 is about 7437.1070316354. The cubic root of 55310561 is about 381.0096901433.

The spelling of 55310561 in words is "fifty-five million, three hundred ten thousand, five hundred sixty-one".