55242422 has 4 divisors (see below), whose sum is σ = 82863636. Its totient is φ = 27621210.

The previous prime is 55242391. The next prime is 55242479. The reversal of 55242422 is 22424255.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 55242391 and 55242400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13810604 + ... + 13810607.

It is an arithmetic number, because the mean of its divisors is an integer number (20715909).

Almost surely, 2^55242422 is an apocalyptic number.

55242422 is a deficient number, since it is larger than the sum of its proper divisors (27621214).

55242422 is a wasteful number, since it uses less digits than its factorization.

55242422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27621213.

The product of its digits is 6400, while the sum is 26.

The square root of 55242422 is about 7432.5246047356. The cubic root of 55242422 is about 380.8531661624.

Adding to 55242422 its reverse (22424255), we get a palindrome (77666677).

The spelling of 55242422 in words is "fifty-five million, two hundred forty-two thousand, four hundred twenty-two".