152212221 has 12 divisors (see below), whose sum is σ = 251271072. Its totient is φ = 86978376.

The previous prime is 152212187. The next prime is 152212241. The reversal of 152212221 is 122212251.

152212221 is a `hidden beast` number, since 1 + 522 + 122 + 21 = 666.

152212221 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 152212221 - 2⁶ = 152212157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 152212194 and 152212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152212241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1207971 + ... + 1208096.

It is an arithmetic number, because the mean of its divisors is an integer number (20939256).

Almost surely, 2^152212221 is an apocalyptic number.

It is an amenable number.

152212221 is a deficient number, since it is larger than the sum of its proper divisors (99058851).

152212221 is a wasteful number, since it uses less digits than its factorization.

152212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416080 (or 2416077 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 152212221 is about 12337.4317019386. The cubic root of 152212221 is about 533.9285874288.

Adding to 152212221 its reverse (122212251), we get a palindrome (274424472).

The spelling of 152212221 in words is "one hundred fifty-two million, two hundred twelve thousand, two hundred twenty-one".