22255577 has 2 divisors, whose sum is σ = 22255578. Its totient is φ = 22255576.

The previous prime is 22255543. The next prime is 22255603. The reversal of 22255577 is 77555222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21752896 + 502681 = 4664^2 + 709^2 .

It is a cyclic number.

It is not a de Polignac number, because 22255577 - 2²² = 18061273 is a prime.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is not a weakly prime, because it can be changed into another prime (22255507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11127788 + 11127789.

It is an arithmetic number, because the mean of its divisors is an integer number (11127789).

Almost surely, 2^22255577 is an apocalyptic number.

It is an amenable number.

22255577 is a deficient number, since it is larger than the sum of its proper divisors (1).

22255577 is an equidigital number, since it uses as much as digits as its factorization.

22255577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49000, while the sum is 35.

The square root of 22255577 is about 4717.5816898068. The cubic root of 22255577 is about 281.2848139950.

It can be divided in two parts, 2 and 2255577, that multiplied together give a palindrome (4511154).

The spelling of 22255577 in words is "twenty-two million, two hundred fifty-five thousand, five hundred seventy-seven".