55402002 has 64 divisors (see below), whose sum is σ = 127733760. Its totient is φ = 17788752.

The previous prime is 55401971. The next prime is 55402007. The reversal of 55402002 is 20020455.

55402002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (55402007) 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 31 ways as a sum of consecutive naturals, for example, 210523 + ... + 210785.

It is an arithmetic number, because the mean of its divisors is an integer number (1995840).

Almost surely, 2^55402002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55402002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63866880).

55402002 is an abundant number, since it is smaller than the sum of its proper divisors (72331758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55402002 is a wasteful number, since it uses less digits than its factorization.

55402002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 55402002 is about 7443.2521118124. The cubic root of 55402002 is about 381.2195399117.

Adding to 55402002 its reverse (20020455), we get a palindrome (75422457).

The spelling of 55402002 in words is "fifty-five million, four hundred two thousand, two".