55442424 has 32 divisors (see below), whose sum is σ = 139116240. Its totient is φ = 18412800.

The previous prime is 55442419. The next prime is 55442459. The reversal of 55442424 is 42424455.

It is a junction number, because it is equal to n+sod(n) for n = 55442391 and 55442400.

It is a congruent number.

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, 2634 + ... + 10854.

Almost surely, 2^55442424 is an apocalyptic number.

It is an amenable number.

55442424 is an abundant number, since it is smaller than the sum of its proper divisors (83673816).

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

55442424 is a wasteful number, since it uses less digits than its factorization.

55442424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8511 (or 8507 counting only the distinct ones).

The product of its digits is 25600, while the sum is 30.

The square root of 55442424 is about 7445.9669620540. The cubic root of 55442424 is about 381.3122315685.

Adding to 55442424 its reverse (42424455), we get a palindrome (97866879).

The spelling of 55442424 in words is "fifty-five million, four hundred forty-two thousand, four hundred twenty-four".