152222321 has 4 divisors (see below), whose sum is σ = 152308644. Its totient is φ = 152136000.

The previous prime is 152222311. The next prime is 152222347. The reversal of 152222321 is 123222251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123222251 = 1811 ⋅68041.

It can be written as a sum of positive squares in 2 ways, for example, as 6682225 + 145540096 = 2585^2 + 12064^2 .

It is a cyclic number.

It is not a de Polignac number, because 152222321 - 2²² = 148028017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 152222293 and 152222302.

It is not an unprimeable number, because it can be changed into a prime (152222311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40460 + ... + 44061.

It is an arithmetic number, because the mean of its divisors is an integer number (38077161).

Almost surely, 2^152222321 is an apocalyptic number.

It is an amenable number.

152222321 is a deficient number, since it is larger than the sum of its proper divisors (86323).

152222321 is an equidigital number, since it uses as much as digits as its factorization.

152222321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86322.

The product of its digits is 480, while the sum is 20.

The square root of 152222321 is about 12337.8410185899. The cubic root of 152222321 is about 533.9403967291.

Adding to 152222321 its reverse (123222251), we get a palindrome (275444572).

The spelling of 152222321 in words is "one hundred fifty-two million, two hundred twenty-two thousand, three hundred twenty-one".