150564221 has 4 divisors (see below), whose sum is σ = 151150332. Its totient is φ = 149978112.

The previous prime is 150564217. The next prime is 150564229. The reversal of 150564221 is 122465051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122465051 = 19 ⋅6445529.

It can be written as a sum of positive squares in 2 ways, for example, as 134676025 + 15888196 = 11605^2 + 3986^2 .

It is a cyclic number.

It is not a de Polignac number, because 150564221 - 2² = 150564217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150564229) 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, 292670 + ... + 293183.

It is an arithmetic number, because the mean of its divisors is an integer number (37787583).

Almost surely, 2^150564221 is an apocalyptic number.

It is an amenable number.

150564221 is a deficient number, since it is larger than the sum of its proper divisors (586111).

150564221 is an equidigital number, since it uses as much as digits as its factorization.

150564221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586110.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 150564221 is about 12270.4613197712. The cubic root of 150564221 is about 531.9946446876.

The spelling of 150564221 in words is "one hundred fifty million, five hundred sixty-four thousand, two hundred twenty-one".