55222145 has 16 divisors (see below), whose sum is σ = 72610560. Its totient is φ = 39984000.

The previous prime is 55222127. The next prime is 55222147. The reversal of 55222145 is 54122255.

55222145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55222145 - 2¹⁶ = 55156609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55222147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11045 + ... + 15245.

It is an arithmetic number, because the mean of its divisors is an integer number (4538160).

Almost surely, 2^55222145 is an apocalyptic number.

55222145 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55222145 is a deficient number, since it is larger than the sum of its proper divisors (17388415).

55222145 is a wasteful number, since it uses less digits than its factorization.

55222145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4456.

The product of its digits is 4000, while the sum is 26.

The square root of 55222145 is about 7431.1604073657. The cubic root of 55222145 is about 380.8065624568.

It can be divided in two parts, 5522 and 2145, that added together give a palindrome (7667).

The spelling of 55222145 in words is "fifty-five million, two hundred twenty-two thousand, one hundred forty-five".