219864897 has 12 divisors (see below), whose sum is σ = 362951680. Its totient is φ = 125637048.

The previous prime is 219864851. The next prime is 219864899. The reversal of 219864897 is 798468912.

It is not a de Polignac number, because 219864897 - 2⁶ = 219864833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (219864899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1744897 + ... + 1745022.

Almost surely, 2^219864897 is an apocalyptic number.

It is an amenable number.

219864897 is a deficient number, since it is larger than the sum of its proper divisors (143086783).

219864897 is a wasteful number, since it uses less digits than its factorization.

219864897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489932 (or 3489929 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 219864897 is about 14827.8419535683. The cubic root of 219864897 is about 603.5574739448.

The spelling of 219864897 in words is "two hundred nineteen million, eight hundred sixty-four thousand, eight hundred ninety-seven".