150051221 has 4 divisors (see below), whose sum is σ = 150075744. Its totient is φ = 150026700.

The previous prime is 150051217. The next prime is 150051229. The reversal of 150051221 is 122150051.

150051221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 122150051 = 149 ⋅819799.

It is a cyclic number.

It is not a de Polignac number, because 150051221 - 2² = 150051217 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 150051221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150051229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5336 + ... + 18126.

It is an arithmetic number, because the mean of its divisors is an integer number (37518936).

Almost surely, 2^150051221 is an apocalyptic number.

It is an amenable number.

150051221 is a deficient number, since it is larger than the sum of its proper divisors (24523).

150051221 is a wasteful number, since it uses less digits than its factorization.

150051221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24522.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 150051221 is about 12249.5396240022. The cubic root of 150051221 is about 531.3897559693.

The spelling of 150051221 in words is "one hundred fifty million, fifty-one thousand, two hundred twenty-one".