221750353049 has 2 divisors, whose sum is σ = 221750353050. Its totient is φ = 221750353048.

The previous prime is 221750353043. The next prime is 221750353117. The reversal of 221750353049 is 940353057122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142989859600 + 78760493449 = 378140^2 + 280643^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221750353049 is a prime.

It is a super-2 number, since 2×221750353049² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221750352997 and 221750353015.

It is not a weakly prime, because it can be changed into another prime (221750353043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110875176524 + 110875176525.

It is an arithmetic number, because the mean of its divisors is an integer number (110875176525).

Almost surely, 2^221750353049 is an apocalyptic number.

It is an amenable number.

221750353049 is a deficient number, since it is larger than the sum of its proper divisors (1).

221750353049 is an equidigital number, since it uses as much as digits as its factorization.

221750353049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 41.

The spelling of 221750353049 in words is "two hundred twenty-one billion, seven hundred fifty million, three hundred fifty-three thousand, forty-nine".