55554442 has 16 divisors (see below), whose sum is σ = 87870240. Its totient is φ = 26269488.

The previous prime is 55554383. The next prime is 55554479. The reversal of 55554442 is 24445555.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 55554398 and 55554407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32493 + ... + 34159.

It is an arithmetic number, because the mean of its divisors is an integer number (5491890).

Almost surely, 2^55554442 is an apocalyptic number.

55554442 is a deficient number, since it is larger than the sum of its proper divisors (32315798).

55554442 is a wasteful number, since it uses less digits than its factorization.

55554442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565.

The product of its digits is 80000, while the sum is 34.

The square root of 55554442 is about 7453.4852250474. The cubic root of 55554442 is about 381.5688647616.

Adding to 55554442 its reverse (24445555), we get a palindrome (79999997).

The spelling of 55554442 in words is "fifty-five million, five hundred fifty-four thousand, four hundred forty-two".