55213424 has 40 divisors (see below), whose sum is σ = 122611200. Its totient is φ = 23594688.

The previous prime is 55213423. The next prime is 55213463. The reversal of 55213424 is 42431255.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 55213393 and 55213402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55213421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66677 + ... + 67499.

It is an arithmetic number, because the mean of its divisors is an integer number (3065280).

Almost surely, 2^55213424 is an apocalyptic number.

It is an amenable number.

55213424 is an abundant number, since it is smaller than the sum of its proper divisors (67397776).

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

55213424 is a wasteful number, since it uses less digits than its factorization.

55213424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437 (or 1431 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 55213424 is about 7430.5735983166. The cubic root of 55213424 is about 380.7865150110.

Adding to 55213424 its reverse (42431255), we get a palindrome (97644679).

The spelling of 55213424 in words is "fifty-five million, two hundred thirteen thousand, four hundred twenty-four".