102215525 has 12 divisors (see below), whose sum is σ = 130836864. Its totient is φ = 79134000.

The previous prime is 102215467. The next prime is 102215527. The reversal of 102215525 is 525512201.

It is not a de Polignac number, because 102215525 - 2¹⁸ = 101953381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102215525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102215527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65171 + ... + 66720.

It is an arithmetic number, because the mean of its divisors is an integer number (10903072).

Almost surely, 2^102215525 is an apocalyptic number.

It is an amenable number.

102215525 is a deficient number, since it is larger than the sum of its proper divisors (28621339).

102215525 is a wasteful number, since it uses less digits than its factorization.

102215525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131932 (or 131927 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 102215525 is about 10110.1693853268. The cubic root of 102215525 is about 467.5617274818.

Adding to 102215525 its reverse (525512201), we get a palindrome (627727726).

The spelling of 102215525 in words is "one hundred two million, two hundred fifteen thousand, five hundred twenty-five".