219478472 has 8 divisors (see below), whose sum is σ = 411522150. Its totient is φ = 109739232.

The previous prime is 219478471. The next prime is 219478499. The reversal of 219478472 is 274874912.

219478472 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 only one way, i.e., 116942596 + 102535876 = 10814^2 + 10126^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (219478471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13717397 + ... + 13717412.

Almost surely, 2^219478472 is an apocalyptic number.

It is an amenable number.

219478472 is a deficient number, since it is larger than the sum of its proper divisors (192043678).

219478472 is a wasteful number, since it uses less digits than its factorization.

219478472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27434815 (or 27434811 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 219478472 is about 14814.8058374047. The cubic root of 219478472 is about 603.2036711144.

The spelling of 219478472 in words is "two hundred nineteen million, four hundred seventy-eight thousand, four hundred seventy-two".