150221173 has 2 divisors, whose sum is σ = 150221174. Its totient is φ = 150221172.

The previous prime is 150221153. The next prime is 150221177. The reversal of 150221173 is 371122051.

It is a happy number.

150221173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137311524 + 12909649 = 11718^2 + 3593^2 .

It is an emirp because it is prime and its reverse (371122051) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-150221173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (150221177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75110586 + 75110587.

It is an arithmetic number, because the mean of its divisors is an integer number (75110587).

Almost surely, 2^150221173 is an apocalyptic number.

It is an amenable number.

150221173 is a deficient number, since it is larger than the sum of its proper divisors (1).

150221173 is an equidigital number, since it uses as much as digits as its factorization.

150221173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 150221173 is about 12256.4747378681. The cubic root of 150221173 is about 531.5903023262.

The spelling of 150221173 in words is "one hundred fifty million, two hundred twenty-one thousand, one hundred seventy-three".