55415080 has 80 divisors (see below), whose sum is σ = 145708020. Its totient is φ = 18966528.

The previous prime is 55415071. The next prime is 55415093. The reversal of 55415080 is 8051455.

It can be written as a sum of positive squares in 2 ways, for example, as 51179716 + 4235364 = 7154^2 + 2058^2 .

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

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 95752 + ... + 96328.

Almost surely, 2^55415080 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 55415080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72854010).

55415080 is an abundant number, since it is smaller than the sum of its proper divisors (90292940).

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

55415080 is an equidigital number, since it uses as much as digits as its factorization.

55415080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 55415080 is about 7444.1305738145. The cubic root of 55415080 is about 381.2495339957.

The spelling of 55415080 in words is "fifty-five million, four hundred fifteen thousand, eighty".