221511000150389 has 2 divisors, whose sum is σ = 221511000150390. Its totient is φ = 221511000150388.

The previous prime is 221511000150383. The next prime is 221511000150449. The reversal of 221511000150389 is 983051000115122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214223473140625 + 7287527009764 = 14636375^2 + 2699542^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221511000150389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221511000150383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110755500075194 + 110755500075195.

It is an arithmetic number, because the mean of its divisors is an integer number (110755500075195).

Almost surely, 2^{221511000150389} is an apocalyptic number.

It is an amenable number.

221511000150389 is a deficient number, since it is larger than the sum of its proper divisors (1).

221511000150389 is an equidigital number, since it uses as much as digits as its factorization.

221511000150389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 38.

The spelling of 221511000150389 in words is "two hundred twenty-one trillion, five hundred eleven billion, one hundred fifty thousand, three hundred eighty-nine".