102106215 has 12 divisors (see below), whose sum is σ = 176984184. Its totient is φ = 54456624.

The previous prime is 102106211. The next prime is 102106241. The reversal of 102106215 is 512601201.

It is not a de Polignac number, because 102106215 - 2² = 102106211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102106211) 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 11 ways as a sum of consecutive naturals, for example, 1134469 + ... + 1134558.

It is an arithmetic number, because the mean of its divisors is an integer number (14748682).

Almost surely, 2^102106215 is an apocalyptic number.

102106215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102106215 is a deficient number, since it is larger than the sum of its proper divisors (74877969).

102106215 is a wasteful number, since it uses less digits than its factorization.

102106215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269038 (or 2269035 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 102106215 is about 10104.7619962075. The cubic root of 102106215 is about 467.3949967688.

Adding to 102106215 its reverse (512601201), we get a palindrome (614707416).

The spelling of 102106215 in words is "one hundred two million, one hundred six thousand, two hundred fifteen".