55045422 has 48 divisors (see below), whose sum is σ = 130656240. Its totient is φ = 16670976.

The previous prime is 55045421. The next prime is 55045423. The reversal of 55045422 is 22454055.

It is an interprime number because it is at equal distance from previous prime (55045421) and next prime (55045423).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55045421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5773 + ... + 11975.

It is an arithmetic number, because the mean of its divisors is an integer number (2722005).

Almost surely, 2^55045422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55045422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65328120).

55045422 is an abundant number, since it is smaller than the sum of its proper divisors (75610818).

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

55045422 is a wasteful number, since it uses less digits than its factorization.

55045422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6257 (or 6254 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 55045422 is about 7419.2602057078. The cubic root of 55045422 is about 380.3999067891.

Adding to 55045422 its reverse (22454055), we get a palindrome (77499477).

The spelling of 55045422 in words is "fifty-five million, forty-five thousand, four hundred twenty-two".