55420422 has 8 divisors (see below), whose sum is σ = 110840856. Its totient is φ = 18473472.

The previous prime is 55420381. The next prime is 55420427. The reversal of 55420422 is 22402455.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

55420422 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 55420392 and 55420401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55420427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4618363 + ... + 4618374.

It is an arithmetic number, because the mean of its divisors is an integer number (13855107).

Almost surely, 2^55420422 is an apocalyptic number.

55420422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55420422 is a wasteful number, since it uses less digits than its factorization.

55420422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9236742.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 55420422 is about 7444.4893713404. The cubic root of 55420422 is about 381.2617843889.

Adding to 55420422 its reverse (22402455), we get a palindrome (77822877).

The spelling of 55420422 in words is "fifty-five million, four hundred twenty thousand, four hundred twenty-two".