55220465 has 16 divisors (see below), whose sum is σ = 68313360. Its totient is φ = 42819840.

The previous prime is 55220419. The next prime is 55220491. The reversal of 55220465 is 56402255.

55220465 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 8 ways, for example, as 8667136 + 46553329 = 2944^2 + 6823^2 .

It is not a de Polignac number, because 55220465 - 2²⁰ = 54171889 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 77531 + ... + 78239.

It is an arithmetic number, because the mean of its divisors is an integer number (4269585).

Almost surely, 2^55220465 is an apocalyptic number.

It is an amenable number.

55220465 is a deficient number, since it is larger than the sum of its proper divisors (13092895).

55220465 is a wasteful number, since it uses less digits than its factorization.

55220465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 55220465 is about 7431.0473689783. The cubic root of 55220465 is about 380.8027007119.

The spelling of 55220465 in words is "fifty-five million, two hundred twenty thousand, four hundred sixty-five".