55615145 has 8 divisors (see below), whose sum is σ = 67399560. Its totient is φ = 44051200.

The previous prime is 55615141. The next prime is 55615163. The reversal of 55615145 is 54151655.

55615145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14295961 + 41319184 = 3781^2 + 6428^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55615145 - 2² = 55615141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55615141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54560 + ... + 55569.

It is an arithmetic number, because the mean of its divisors is an integer number (8424945).

Almost surely, 2^55615145 is an apocalyptic number.

It is an amenable number.

55615145 is a deficient number, since it is larger than the sum of its proper divisors (11784415).

55615145 is a wasteful number, since it uses less digits than its factorization.

55615145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110235.

The product of its digits is 15000, while the sum is 32.

The square root of 55615145 is about 7457.5562351215. The cubic root of 55615145 is about 381.7077912078.

The spelling of 55615145 in words is "fifty-five million, six hundred fifteen thousand, one hundred forty-five".