102219444 has 18 divisors (see below), whose sum is σ = 258388130. Its totient is φ = 34073136.

The previous prime is 102219413. The next prime is 102219463. The reversal of 102219444 is 444912201.

It is a happy number.

102219444 is a `hidden beast` number, since 1 + 0 + 2 + 219 + 444 = 666.

It can be written as a sum of positive squares in only one way, i.e., 51667344 + 50552100 = 7188^2 + 7110^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1419679 + ... + 1419750.

Almost surely, 2^102219444 is an apocalyptic number.

It is an amenable number.

102219444 is an abundant number, since it is smaller than the sum of its proper divisors (156168686).

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

102219444 is a wasteful number, since it uses less digits than its factorization.

102219444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839439 (or 2839434 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 102219444 is about 10110.3631982239. The cubic root of 102219444 is about 467.5677029309.

The spelling of 102219444 in words is "one hundred two million, two hundred nineteen thousand, four hundred forty-four".