55402122 has 16 divisors (see below), whose sum is σ = 114625440. Its totient is φ = 17830512.

The previous prime is 55402097. The next prime is 55402129. The reversal of 55402122 is 22120455.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55402129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159028 + ... + 159375.

It is an arithmetic number, because the mean of its divisors is an integer number (7164090).

Almost surely, 2^55402122 is an apocalyptic number.

55402122 is an abundant number, since it is smaller than the sum of its proper divisors (59223318).

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

55402122 is a wasteful number, since it uses less digits than its factorization.

55402122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318437.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 55402122 is about 7443.2601728006. The cubic root of 55402122 is about 381.2198151503.

Adding to 55402122 its reverse (22120455), we get a palindrome (77522577).

The spelling of 55402122 in words is "fifty-five million, four hundred two thousand, one hundred twenty-two".