55406512 has 40 divisors (see below), whose sum is σ = 123603200. Its totient is φ = 23568192.

The previous prime is 55406509. The next prime is 55406513. The reversal of 55406512 is 21560455.

It is a super-2 number, since 2×55406512² = 6139763144012288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (55406513) 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, 13789 + ... + 17347.

It is an arithmetic number, because the mean of its divisors is an integer number (3090080).

Almost surely, 2^55406512 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 55406512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61801600).

55406512 is an abundant number, since it is smaller than the sum of its proper divisors (68196688).

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

55406512 is a wasteful number, since it uses less digits than its factorization.

55406512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3713 (or 3707 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 55406512 is about 7443.5550646180. Note that the first 3 decimals coincide. The cubic root of 55406512 is about 381.2298840233.

Adding to 55406512 its reverse (21560455), we get a palindrome (76966967).

The spelling of 55406512 in words is "fifty-five million, four hundred six thousand, five hundred twelve".