102213444 has 12 divisors (see below), whose sum is σ = 238498064. Its totient is φ = 34071144.

The previous prime is 102213443. The next prime is 102213457. The reversal of 102213444 is 444312201.

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

It is a super-2 number, since 2×102213444² = 20895176268682272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102213444.

It is not an unprimeable number, because it can be changed into a prime (102213443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4258882 + ... + 4258905.

Almost surely, 2^102213444 is an apocalyptic number.

It is an amenable number.

102213444 is an abundant number, since it is smaller than the sum of its proper divisors (136284620).

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

102213444 is a wasteful number, since it uses less digits than its factorization.

102213444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8517794 (or 8517792 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 102213444 is about 10110.0664686242. The cubic root of 102213444 is about 467.5585544395.

Adding to 102213444 its reverse (444312201), we get a palindrome (546525645).

The spelling of 102213444 in words is "one hundred two million, two hundred thirteen thousand, four hundred forty-four".