224446405664381 has 2 divisors, whose sum is σ = 224446405664382. Its totient is φ = 224446405664380.

The previous prime is 224446405664237. The next prime is 224446405664413. The reversal of 224446405664381 is 183466504644422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127877852439481 + 96568553224900 = 11308309^2 + 9826930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224446405664381 is a prime.

It is a super-2 number, since 2×224446405664381² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 224446405664381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224446405666381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112223202832190 + 112223202832191.

It is an arithmetic number, because the mean of its divisors is an integer number (112223202832191).

Almost surely, 2^{224446405664381} is an apocalyptic number.

It is an amenable number.

224446405664381 is a deficient number, since it is larger than the sum of its proper divisors (1).

224446405664381 is an equidigital number, since it uses as much as digits as its factorization.

224446405664381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 106168320, while the sum is 59.

The spelling of 224446405664381 in words is "two hundred twenty-four trillion, four hundred forty-six billion, four hundred five million, six hundred sixty-four thousand, three hundred eighty-one".