102219945 has 8 divisors (see below), whose sum is σ = 163551936. Its totient is φ = 54517296.

The previous prime is 102219911. The next prime is 102219959. The reversal of 102219945 is 549912201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102219945 - 2¹¹ = 102217897 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3407317 + ... + 3407346.

It is an arithmetic number, because the mean of its divisors is an integer number (20443992).

Almost surely, 2^102219945 is an apocalyptic number.

102219945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102219945 is a deficient number, since it is larger than the sum of its proper divisors (61331991).

102219945 is an equidigital number, since it uses as much as digits as its factorization.

102219945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6814671.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 102219945 is about 10110.3879747515. The cubic root of 102219945 is about 467.5684668137.

The spelling of 102219945 in words is "one hundred two million, two hundred nineteen thousand, nine hundred forty-five".