55440002 has 4 divisors (see below), whose sum is σ = 83160006. Its totient is φ = 27720000.

The previous prime is 55439981. The next prime is 55440013. The reversal of 55440002 is 20004455.

It is a happy number.

55440002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 31125241 + 24314761 = 5579^2 + 4931^2 .

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 as a sum of consecutive naturals, namely, 13859999 + ... + 13860002.

Almost surely, 2^55440002 is an apocalyptic number.

55440002 is a deficient number, since it is larger than the sum of its proper divisors (27720004).

55440002 is a wasteful number, since it uses less digits than its factorization.

55440002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27720003.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 55440002 is about 7445.8043218983. The cubic root of 55440002 is about 381.3066789513.

Adding to 55440002 its reverse (20004455), we get a palindrome (75444457).

The spelling of 55440002 in words is "fifty-five million, four hundred forty thousand, two".