55225402 has 4 divisors (see below), whose sum is σ = 82838106. Its totient is φ = 27612700.

The previous prime is 55225399. The next prime is 55225403. The reversal of 55225402 is 20452255.

It is a happy number.

55225402 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, and also an emirpimes, since its reverse is a distinct semiprime: 20452255 = 5 ⋅4090451.

It can be written as a sum of positive squares in only one way, i.e., 40564161 + 14661241 = 6369^2 + 3829^2 .

It is not an unprimeable number, because it can be changed into a prime (55225403) 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 as a sum of consecutive naturals, namely, 13806349 + ... + 13806352.

Almost surely, 2^55225402 is an apocalyptic number.

55225402 is a deficient number, since it is larger than the sum of its proper divisors (27612704).

55225402 is a wasteful number, since it uses less digits than its factorization.

55225402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27612703.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 55225402 is about 7431.3795489128. The cubic root of 55225402 is about 380.8140489618.

Adding to 55225402 its reverse (20452255), we get a palindrome (75677657).

The spelling of 55225402 in words is "fifty-five million, two hundred twenty-five thousand, four hundred two".