224721697901 has 2 divisors, whose sum is σ = 224721697902. Its totient is φ = 224721697900.

The previous prime is 224721697853. The next prime is 224721697909. The reversal of 224721697901 is 109796127422.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217481389801 + 7240308100 = 466349^2 + 85090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224721697901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 224721697901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224721697909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112360848950 + 112360848951.

It is an arithmetic number, because the mean of its divisors is an integer number (112360848951).

Almost surely, 2^224721697901 is an apocalyptic number.

It is an amenable number.

224721697901 is a deficient number, since it is larger than the sum of its proper divisors (1).

224721697901 is an equidigital number, since it uses as much as digits as its factorization.

224721697901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 224721697901 in words is "two hundred twenty-four billion, seven hundred twenty-one million, six hundred ninety-seven thousand, nine hundred one".