219425172 has 12 divisors (see below), whose sum is σ = 511992096. Its totient is φ = 73141720.

The previous prime is 219425111. The next prime is 219425179. The reversal of 219425172 is 271524912.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×219425172² = 96294812214459168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219425179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9142704 + ... + 9142727.

It is an arithmetic number, because the mean of its divisors is an integer number (42666008).

Almost surely, 2^219425172 is an apocalyptic number.

It is an amenable number.

219425172 is an abundant number, since it is smaller than the sum of its proper divisors (292566924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

219425172 is a wasteful number, since it uses less digits than its factorization.

219425172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18285438 (or 18285436 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 219425172 is about 14813.0068520878. The cubic root of 219425172 is about 603.1548381419.

The spelling of 219425172 in words is "two hundred nineteen million, four hundred twenty-five thousand, one hundred seventy-two".