55065420 has 120 divisors (see below), whose sum is σ = 181935600. Its totient is φ = 13903488.

The previous prime is 55065407. The next prime is 55065421. The reversal of 55065420 is 2456055.

55065420 is a `hidden beast` number, since 5 + 5 + 0 + 654 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (55065421) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 29886 + ... + 31674.

It is an arithmetic number, because the mean of its divisors is an integer number (1516130).

Almost surely, 2^55065420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55065420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90967800).

55065420 is an abundant number, since it is smaller than the sum of its proper divisors (126870180).

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

55065420 is a wasteful number, since it uses less digits than its factorization.

55065420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829 (or 1818 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 55065420 is about 7420.6077918187. The cubic root of 55065420 is about 380.4459676361.

The spelling of 55065420 in words is "fifty-five million, sixty-five thousand, four hundred twenty".