150665221 has 16 divisors (see below), whose sum is σ = 180619776. Its totient is φ = 122967936.

The previous prime is 150665213. The next prime is 150665227. The reversal of 150665221 is 122566051.

150665221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 150665221 - 2³ = 150665213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 150665221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150665227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5985 + ... + 18361.

It is an arithmetic number, because the mean of its divisors is an integer number (11288736).

Almost surely, 2^150665221 is an apocalyptic number.

It is an amenable number.

150665221 is a deficient number, since it is larger than the sum of its proper divisors (29954555).

150665221 is a wasteful number, since it uses less digits than its factorization.

150665221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12468.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 150665221 is about 12274.5762044968. The cubic root of 150665221 is about 532.1135738921.

The spelling of 150665221 in words is "one hundred fifty million, six hundred sixty-five thousand, two hundred twenty-one".