20224261 has 2 divisors, whose sum is σ = 20224262. Its totient is φ = 20224260.

The previous prime is 20224247. The next prime is 20224273. The reversal of 20224261 is 16242202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19448100 + 776161 = 4410^2 + 881^2 .

It is a cyclic number.

It is not a de Polignac number, because 20224261 - 2⁵ = 20224229 is a prime.

It is a super-2 number, since 2×20224261² = 818041465992242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20224661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112130 + 10112131.

It is an arithmetic number, because the mean of its divisors is an integer number (10112131).

Almost surely, 2^20224261 is an apocalyptic number.

It is an amenable number.

20224261 is a deficient number, since it is larger than the sum of its proper divisors (1).

20224261 is an equidigital number, since it uses as much as digits as its factorization.

20224261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20224261 is about 4497.1392017593. The cubic root of 20224261 is about 272.4525563392.

Adding to 20224261 its reverse (16242202), we get a palindrome (36466463).

The spelling of 20224261 in words is "twenty million, two hundred twenty-four thousand, two hundred sixty-one".