55442225 has 12 divisors (see below), whose sum is σ = 68937180. Its totient is φ = 44232000.

The previous prime is 55442203. The next prime is 55442239. The reversal of 55442225 is 52224455.

It can be written as a sum of positive squares in 6 ways, for example, as 430336 + 55011889 = 656^2 + 7417^2 .

It is not a de Polignac number, because 55442225 - 2²⁰ = 54393649 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6875 + ... + 12575.

It is an arithmetic number, because the mean of its divisors is an integer number (5744765).

Almost surely, 2^55442225 is an apocalyptic number.

It is an amenable number.

55442225 is a deficient number, since it is larger than the sum of its proper divisors (13494955).

55442225 is a wasteful number, since it uses less digits than its factorization.

55442225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6100 (or 6095 counting only the distinct ones).

The product of its digits is 16000, while the sum is 29.

The square root of 55442225 is about 7445.9535991033. The cubic root of 55442225 is about 381.3117753521.

The spelling of 55442225 in words is "fifty-five million, four hundred forty-two thousand, two hundred twenty-five".