219948427 has 4 divisors (see below), whose sum is σ = 231524680. Its totient is φ = 208372176.

The previous prime is 219948367. The next prime is 219948433. The reversal of 219948427 is 724849912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219948427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219948437) 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 3 ways as a sum of consecutive naturals, for example, 5788098 + ... + 5788135.

It is an arithmetic number, because the mean of its divisors is an integer number (57881170).

Almost surely, 2^219948427 is an apocalyptic number.

219948427 is a deficient number, since it is larger than the sum of its proper divisors (11576253).

219948427 is a wasteful number, since it uses less digits than its factorization.

219948427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11576252.

The product of its digits is 290304, while the sum is 46.

The square root of 219948427 is about 14830.6583468166. The cubic root of 219948427 is about 603.6338978053.

The spelling of 219948427 in words is "two hundred nineteen million, nine hundred forty-eight thousand, four hundred twenty-seven".