152606221 has 2 divisors, whose sum is σ = 152606222. Its totient is φ = 152606220.

The previous prime is 152606203. The next prime is 152606231. The reversal of 152606221 is 122606251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86769225 + 65836996 = 9315^2 + 8114^2 .

It is a cyclic number.

It is not a de Polignac number, because 152606221 - 2¹⁹ = 152081933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152606231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76303110 + 76303111.

It is an arithmetic number, because the mean of its divisors is an integer number (76303111).

Almost surely, 2^152606221 is an apocalyptic number.

It is an amenable number.

152606221 is a deficient number, since it is larger than the sum of its proper divisors (1).

152606221 is an equidigital number, since it uses as much as digits as its factorization.

152606221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 152606221 is about 12353.3890491638. The cubic root of 152606221 is about 534.3888803253.

The spelling of 152606221 in words is "one hundred fifty-two million, six hundred six thousand, two hundred twenty-one".