149633221 has 2 divisors, whose sum is σ = 149633222. Its totient is φ = 149633220.

The previous prime is 149633207. The next prime is 149633233. The reversal of 149633221 is 122336941.

149633221 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., 138650625 + 10982596 = 11775^2 + 3314^2 .

It is a cyclic number.

It is not a de Polignac number, because 149633221 - 2⁹ = 149632709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149633251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74816610 + 74816611.

It is an arithmetic number, because the mean of its divisors is an integer number (74816611).

Almost surely, 2^149633221 is an apocalyptic number.

It is an amenable number.

149633221 is a deficient number, since it is larger than the sum of its proper divisors (1).

149633221 is an equidigital number, since it uses as much as digits as its factorization.

149633221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 149633221 is about 12232.4658593433. The cubic root of 149633221 is about 530.8958635249.

The spelling of 149633221 in words is "one hundred forty-nine million, six hundred thirty-three thousand, two hundred twenty-one".