224130421 has 2 divisors, whose sum is σ = 224130422. Its totient is φ = 224130420.

The previous prime is 224130383. The next prime is 224130437. The reversal of 224130421 is 124031422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222427396 + 1703025 = 14914^2 + 1305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224130421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224130721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112065210 + 112065211.

It is an arithmetic number, because the mean of its divisors is an integer number (112065211).

Almost surely, 2^224130421 is an apocalyptic number.

It is an amenable number.

224130421 is a deficient number, since it is larger than the sum of its proper divisors (1).

224130421 is an equidigital number, since it uses as much as digits as its factorization.

224130421 is an odious number, because the sum of its binary digits is odd.

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

The square root of 224130421 is about 14970.9859728743. The cubic root of 224130421 is about 607.4356390576.

Adding to 224130421 its reverse (124031422), we get a palindrome (348161843).

The spelling of 224130421 in words is "two hundred twenty-four million, one hundred thirty thousand, four hundred twenty-one".