150551321 has 2 divisors, whose sum is σ = 150551322. Its totient is φ = 150551320.

The previous prime is 150551287. The next prime is 150551329. The reversal of 150551321 is 123155051.

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., 144120025 + 6431296 = 12005^2 + 2536^2 .

It is a cyclic number.

It is not a de Polignac number, because 150551321 - 2⁶ = 150551257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (150551329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75275660 + 75275661.

It is an arithmetic number, because the mean of its divisors is an integer number (75275661).

Almost surely, 2^150551321 is an apocalyptic number.

It is an amenable number.

150551321 is a deficient number, since it is larger than the sum of its proper divisors (1).

150551321 is an equidigital number, since it uses as much as digits as its factorization.

150551321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 150551321 is about 12269.9356559030. The cubic root of 150551321 is about 531.9794508900.

The spelling of 150551321 in words is "one hundred fifty million, five hundred fifty-one thousand, three hundred twenty-one".