219198404 has 6 divisors (see below), whose sum is σ = 383597214. Its totient is φ = 109599200.

The previous prime is 219198403. The next prime is 219198409. The reversal of 219198404 is 404891912.

It can be written as a sum of positive squares in only one way, i.e., 219040000 + 158404 = 14800^2 + 398^2 .

It is a super-2 number, since 2×219198404² = 96095880632294432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (219198401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27399797 + ... + 27399804.

It is an arithmetic number, because the mean of its divisors is an integer number (63932869).

Almost surely, 2^219198404 is an apocalyptic number.

It is an amenable number.

219198404 is a deficient number, since it is larger than the sum of its proper divisors (164398810).

219198404 is a wasteful number, since it uses less digits than its factorization.

219198404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54799605 (or 54799603 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 219198404 is about 14805.3505193224. The cubic root of 219198404 is about 602.9469869339.

The spelling of 219198404 in words is "two hundred nineteen million, one hundred ninety-eight thousand, four hundred four".