55420122 has 32 divisors (see below), whose sum is σ = 113832000. Its totient is φ = 17981568.

The previous prime is 55420121. The next prime is 55420129. The reversal of 55420122 is 22102455.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55420121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35004 + ... + 36552.

It is an arithmetic number, because the mean of its divisors is an integer number (3557250).

Almost surely, 2^55420122 is an apocalyptic number.

55420122 is an abundant number, since it is smaller than the sum of its proper divisors (58411878).

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

55420122 is a wasteful number, since it uses less digits than its factorization.

55420122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710.

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

The square root of 55420122 is about 7444.4692221810. The cubic root of 55420122 is about 381.2610964431.

Adding to 55420122 its reverse (22102455), we get a palindrome (77522577).

The spelling of 55420122 in words is "fifty-five million, four hundred twenty thousand, one hundred twenty-two".