149549221 has 8 divisors (see below), whose sum is σ = 158471640. Its totient is φ = 140640768.

The previous prime is 149549173. The next prime is 149549249. The reversal of 149549221 is 122945941.

149549221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1050625 + 148498596 = 1025^2 + 12186^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149549221 - 2¹⁹ = 149024933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149549261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25515 + ... + 30823.

It is an arithmetic number, because the mean of its divisors is an integer number (19808955).

Almost surely, 2^149549221 is an apocalyptic number.

It is an amenable number.

149549221 is a deficient number, since it is larger than the sum of its proper divisors (8922419).

149549221 is a wasteful number, since it uses less digits than its factorization.

149549221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6983.

The product of its digits is 25920, while the sum is 37.

The square root of 149549221 is about 12229.0318913641. The cubic root of 149549221 is about 530.7965014543.

The spelling of 149549221 in words is "one hundred forty-nine million, five hundred forty-nine thousand, two hundred twenty-one".