150665261 has 2 divisors, whose sum is σ = 150665262. Its totient is φ = 150665260.

The previous prime is 150665243. The next prime is 150665311. The reversal of 150665261 is 162566051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150528361 + 136900 = 12269^2 + 370^2 .

It is an emirp because it is prime and its reverse (162566051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 150665261 - 2⁶ = 150665197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (150665461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75332630 + 75332631.

It is an arithmetic number, because the mean of its divisors is an integer number (75332631).

Almost surely, 2^150665261 is an apocalyptic number.

It is an amenable number.

150665261 is a deficient number, since it is larger than the sum of its proper divisors (1).

150665261 is an equidigital number, since it uses as much as digits as its factorization.

150665261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 150665261 is about 12274.5778338809. The cubic root of 150665261 is about 532.1136209822.

The spelling of 150665261 in words is "one hundred fifty million, six hundred sixty-five thousand, two hundred sixty-one".