152775221 has 2 divisors, whose sum is σ = 152775222. Its totient is φ = 152775220.

The previous prime is 152775199. The next prime is 152775229. The reversal of 152775221 is 122577251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144336196 + 8439025 = 12014^2 + 2905^2 .

It is a cyclic number.

It is not a de Polignac number, because 152775221 - 2⁶ = 152775157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152775229) 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 as a sum of consecutive naturals, namely, 76387610 + 76387611.

It is an arithmetic number, because the mean of its divisors is an integer number (76387611).

Almost surely, 2^152775221 is an apocalyptic number.

It is an amenable number.

152775221 is a deficient number, since it is larger than the sum of its proper divisors (1).

152775221 is an equidigital number, since it uses as much as digits as its factorization.

152775221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9800, while the sum is 32.

The square root of 152775221 is about 12360.2273846398. The cubic root of 152775221 is about 534.5860728181.

The spelling of 152775221 in words is "one hundred fifty-two million, seven hundred seventy-five thousand, two hundred twenty-one".