102511225 has 24 divisors (see below), whose sum is σ = 129991680. Its totient is φ = 80176320.

The previous prime is 102511219. The next prime is 102511229. The reversal of 102511225 is 522115201.

It is a de Polignac number, because none of the positive numbers 2^k-102511225 is a prime.

It is a super-3 number, since 3×102511225³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (102511229) 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 23 ways as a sum of consecutive naturals, for example, 263331 + ... + 263719.

It is an arithmetic number, because the mean of its divisors is an integer number (5416320).

Almost surely, 2^102511225 is an apocalyptic number.

It is an amenable number.

102511225 is a deficient number, since it is larger than the sum of its proper divisors (27480455).

102511225 is a wasteful number, since it uses less digits than its factorization.

102511225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609 (or 604 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 102511225 is about 10124.7827137179. The cubic root of 102511225 is about 468.0121642564.

Adding to 102511225 its reverse (522115201), we get a palindrome (624626426).

It can be divided in two parts, 10251 and 1225, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 102511225 in words is "one hundred two million, five hundred eleven thousand, two hundred twenty-five".