55005510 has 64 divisors (see below), whose sum is σ = 154109952. Its totient is φ = 12302976.

The previous prime is 55005481. The next prime is 55005521. The reversal of 55005510 is 1550055.

It is a super-2 number, since 2×55005510² = 6051212260720200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7084 + ... + 12656.

It is an arithmetic number, because the mean of its divisors is an integer number (2407968).

Almost surely, 2^55005510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55005510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77054976).

55005510 is an abundant number, since it is smaller than the sum of its proper divisors (99104442).

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

55005510 is a wasteful number, since it uses less digits than its factorization.

55005510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5637.

The product of its (nonzero) digits is 625, while the sum is 21.

The square root of 55005510 is about 7416.5699619164. The cubic root of 55005510 is about 380.3079452085.

Adding to 55005510 its reverse (1550055), we get a palindrome (56555565).

The spelling of 55005510 in words is "fifty-five million, five thousand, five hundred ten".