102005219 has 4 divisors (see below), whose sum is σ = 108005544. Its totient is φ = 96004896.

The previous prime is 102005191. The next prime is 102005261. The reversal of 102005219 is 912500201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912500201 = 23549 ⋅38749.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102005219 is a prime.

It is a super-2 number, since 2×102005219² = 20810129406475922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102005219.

It is not an unprimeable number, because it can be changed into a prime (102005279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3000137 + ... + 3000170.

It is an arithmetic number, because the mean of its divisors is an integer number (27001386).

Almost surely, 2^102005219 is an apocalyptic number.

102005219 is a deficient number, since it is larger than the sum of its proper divisors (6000325).

102005219 is an equidigital number, since it uses as much as digits as its factorization.

102005219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000324.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 102005219 is about 10099.7633140584. The cubic root of 102005219 is about 467.2408416158.

The spelling of 102005219 in words is "one hundred two million, five thousand, two hundred nineteen".