148995221 has 2 divisors, whose sum is σ = 148995222. Its totient is φ = 148995220.

The previous prime is 148995193. The next prime is 148995239. The reversal of 148995221 is 122599841.

148995221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141372100 + 7623121 = 11890^2 + 2761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148995221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148995251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74497610 + 74497611.

It is an arithmetic number, because the mean of its divisors is an integer number (74497611).

Almost surely, 2^148995221 is an apocalyptic number.

It is an amenable number.

148995221 is a deficient number, since it is larger than the sum of its proper divisors (1).

148995221 is an equidigital number, since it uses as much as digits as its factorization.

148995221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 41.

The square root of 148995221 is about 12206.3598586966. The cubic root of 148995221 is about 530.1402512416.

The spelling of 148995221 in words is "one hundred forty-eight million, nine hundred ninety-five thousand, two hundred twenty-one".