55124421 has 32 divisors (see below), whose sum is σ = 85857408. Its totient is φ = 31088640.

The previous prime is 55124411. The next prime is 55124423. The reversal of 55124421 is 12442155.

It is not a de Polignac number, because 55124421 - 2⁶ = 55124357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55124391 and 55124400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55124423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53911 + ... + 54923.

It is an arithmetic number, because the mean of its divisors is an integer number (2683044).

Almost surely, 2^55124421 is an apocalyptic number.

55124421 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

55124421 is a deficient number, since it is larger than the sum of its proper divisors (30732987).

55124421 is a wasteful number, since it uses less digits than its factorization.

55124421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141.

The product of its digits is 1600, while the sum is 24.

The square root of 55124421 is about 7424.5822104681. The cubic root of 55124421 is about 380.5817980739.

Adding to 55124421 its reverse (12442155), we get a palindrome (67566576).

The spelling of 55124421 in words is "fifty-five million, one hundred twenty-four thousand, four hundred twenty-one".