150166221 has 4 divisors (see below), whose sum is σ = 200221632. Its totient is φ = 100110812.

The previous prime is 150166199. The next prime is 150166259. The reversal of 150166221 is 122661051.

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 an emirpimes, since its reverse is a distinct semiprime: 122661051 = 3 ⋅40887017.

It is a cyclic number.

It is not a de Polignac number, because 150166221 - 2²³ = 141777613 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 150166191 and 150166200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150166271) 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, 25027701 + ... + 25027706.

It is an arithmetic number, because the mean of its divisors is an integer number (50055408).

Almost surely, 2^150166221 is an apocalyptic number.

It is an amenable number.

150166221 is a deficient number, since it is larger than the sum of its proper divisors (50055411).

150166221 is an equidigital number, since it uses as much as digits as its factorization.

150166221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50055410.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 150166221 is about 12254.2327789217. The cubic root of 150166221 is about 531.5254745516.

The spelling of 150166221 in words is "one hundred fifty million, one hundred sixty-six thousand, two hundred twenty-one".