55315445 has 4 divisors (see below), whose sum is σ = 66378540. Its totient is φ = 44252352.

The previous prime is 55315427. The next prime is 55315451. The reversal of 55315445 is 54451355.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29691601 + 25623844 = 5449^2 + 5062^2 .

It is a cyclic number.

It is not a de Polignac number, because 55315445 - 2¹⁰ = 55314421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5531540 + ... + 5531549.

It is an arithmetic number, because the mean of its divisors is an integer number (16594635).

Almost surely, 2^55315445 is an apocalyptic number.

It is an amenable number.

55315445 is a deficient number, since it is larger than the sum of its proper divisors (11063095).

55315445 is a wasteful number, since it uses less digits than its factorization.

55315445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11063094.

The product of its digits is 30000, while the sum is 32.

The square root of 55315445 is about 7437.4353778705. The cubic root of 55315445 is about 381.0209043763.

The spelling of 55315445 in words is "fifty-five million, three hundred fifteen thousand, four hundred forty-five".