55105530 has 32 divisors (see below), whose sum is σ = 132862464. Its totient is φ = 14627136.

The previous prime is 55105451. The next prime is 55105537. The reversal of 55105530 is 3550155.

It is a self number, because there is not a number n which added to its sum of digits gives 55105530.

It is not an unprimeable number, because it can be changed into a prime (55105537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2572 + ... + 10808.

It is an arithmetic number, because the mean of its divisors is an integer number (4151952).

Almost surely, 2^55105530 is an apocalyptic number.

55105530 is an abundant number, since it is smaller than the sum of its proper divisors (77756934).

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

55105530 is a wasteful number, since it uses less digits than its factorization.

55105530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8470.

The product of its (nonzero) digits is 1875, while the sum is 24.

The square root of 55105530 is about 7423.3099086593. The cubic root of 55105530 is about 380.5383182994.

Adding to 55105530 its reverse (3550155), we get a palindrome (58655685).

The spelling of 55105530 in words is "fifty-five million, one hundred five thousand, five hundred thirty".