221411245 has 12 divisors (see below), whose sum is σ = 292044060. Its totient is φ = 161025920.

The previous prime is 221411233. The next prime is 221411251. The reversal of 221411245 is 542114122.

It can be written as a sum of positive squares in 2 ways, for example, as 111978724 + 109432521 = 10582^2 + 10461^2 .

It is not a de Polignac number, because 221411245 - 2¹¹ = 221409197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182380 + ... + 183589.

It is an arithmetic number, because the mean of its divisors is an integer number (24337005).

Almost surely, 2^221411245 is an apocalyptic number.

It is an amenable number.

221411245 is a deficient number, since it is larger than the sum of its proper divisors (70632815).

221411245 is a wasteful number, since it uses less digits than its factorization.

221411245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365996 (or 365985 counting only the distinct ones).

The product of its digits is 640, while the sum is 22.

The square root of 221411245 is about 14879.8939848374. The cubic root of 221411245 is about 604.9691444319.

Adding to 221411245 its reverse (542114122), we get a palindrome (763525367).

The spelling of 221411245 in words is "two hundred twenty-one million, four hundred eleven thousand, two hundred forty-five".