150232721 has 2 divisors, whose sum is σ = 150232722. Its totient is φ = 150232720.

The previous prime is 150232717. The next prime is 150232751. The reversal of 150232721 is 127232051.

It is a happy number.

150232721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127803025 + 22429696 = 11305^2 + 4736^2 .

It is an emirp because it is prime and its reverse (127232051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 150232721 - 2² = 150232717 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (150232751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75116360 + 75116361.

It is an arithmetic number, because the mean of its divisors is an integer number (75116361).

Almost surely, 2^150232721 is an apocalyptic number.

It is an amenable number.

150232721 is a deficient number, since it is larger than the sum of its proper divisors (1).

150232721 is an equidigital number, since it uses as much as digits as its factorization.

150232721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 150232721 is about 12256.9458267547. The cubic root of 150232721 is about 531.6039236806.

Adding to 150232721 its reverse (127232051), we get a palindrome (277464772).

The spelling of 150232721 in words is "one hundred fifty million, two hundred thirty-two thousand, seven hundred twenty-one".