219731927049 has 24 divisors (see below), whose sum is σ = 328838042624. Its totient is φ = 141239376000.

The previous prime is 219731927039. The next prime is 219731927071. The reversal of 219731927049 is 940729137912.

It is a happy number.

219731927049 is a `hidden beast` number, since 2 + 19 + 7 + 319 + 270 + 49 = 666.

It is not a de Polignac number, because 219731927049 - 2⁴ = 219731927033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 219731926986 and 219731927004.

It is not an unprimeable number, because it can be changed into a prime (219731927039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1377472 + ... + 1528689.

Almost surely, 2^219731927049 is an apocalyptic number.

It is an amenable number.

219731927049 is a deficient number, since it is larger than the sum of its proper divisors (109106115575).

219731927049 is a wasteful number, since it uses less digits than its factorization.

219731927049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906469 (or 2906466 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The spelling of 219731927049 in words is "two hundred nineteen billion, seven hundred thirty-one million, nine hundred twenty-seven thousand, forty-nine".