55210145 has 4 divisors (see below), whose sum is σ = 66252180. Its totient is φ = 44168112.

The previous prime is 55210139. The next prime is 55210193. The reversal of 55210145 is 54101255.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12229009 + 42981136 = 3497^2 + 6556^2 .

It is a cyclic number.

It is not a de Polignac number, because 55210145 - 2¹⁸ = 54948001 is a prime.

It is a super-2 number, since 2×55210145² = 6096320221842050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55210145.

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 3 ways as a sum of consecutive naturals, for example, 5521010 + ... + 5521019.

It is an arithmetic number, because the mean of its divisors is an integer number (16563045).

Almost surely, 2^55210145 is an apocalyptic number.

It is an amenable number.

55210145 is a deficient number, since it is larger than the sum of its proper divisors (11042035).

55210145 is a wasteful number, since it uses less digits than its factorization.

55210145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11042034.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 55210145 is about 7430.3529525858. The cubic root of 55210145 is about 380.7789768460.

It can be divided in two parts, 55210 and 145, that added together give a palindrome (55355).

The spelling of 55210145 in words is "fifty-five million, two hundred ten thousand, one hundred forty-five".