219531149 has 16 divisors (see below), whose sum is σ = 246110400. Its totient is φ = 194598144.

The previous prime is 219531139. The next prime is 219531161. The reversal of 219531149 is 941135912.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 219531149 - 2⁴ = 219531133 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 (219531139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55919 + ... + 59715.

It is an arithmetic number, because the mean of its divisors is an integer number (15381900).

Almost surely, 2^219531149 is an apocalyptic number.

It is an amenable number.

219531149 is a deficient number, since it is larger than the sum of its proper divisors (26579251).

219531149 is a wasteful number, since it uses less digits than its factorization.

219531149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4012.

The product of its digits is 9720, while the sum is 35.

The square root of 219531149 is about 14816.5835805694. The cubic root of 219531149 is about 603.2519255328.

The spelling of 219531149 in words is "two hundred nineteen million, five hundred thirty-one thousand, one hundred forty-nine".