55501420 has 24 divisors (see below), whose sum is σ = 125519184. Its totient is φ = 20492736.

The previous prime is 55501403. The next prime is 55501421. The reversal of 55501420 is 2410555.

It is a junction number, because it is equal to n+sod(n) for n = 55501391 and 55501400.

It is not an unprimeable number, because it can be changed into a prime (55501421) 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, 106474 + ... + 106993.

It is an arithmetic number, because the mean of its divisors is an integer number (5229966).

Almost surely, 2^55501420 is an apocalyptic number.

It is an amenable number.

55501420 is an abundant number, since it is smaller than the sum of its proper divisors (70017764).

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

55501420 is a wasteful number, since it uses less digits than its factorization.

55501420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213489 (or 213487 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 55501420 is about 7449.9275164259. The cubic root of 55501420 is about 381.4474344225.

Adding to 55501420 its reverse (2410555), we get a palindrome (57911975).

The spelling of 55501420 in words is "fifty-five million, five hundred one thousand, four hundred twenty".