102515225 has 24 divisors (see below), whose sum is σ = 132908160. Its totient is φ = 78361920.

The previous prime is 102515221. The next prime is 102515297. The reversal of 102515225 is 522515201.

It is not a de Polignac number, because 102515225 - 2² = 102515221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102515225.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102515221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49511 + ... + 51539.

It is an arithmetic number, because the mean of its divisors is an integer number (5537840).

Almost surely, 2^102515225 is an apocalyptic number.

It is an amenable number.

102515225 is a deficient number, since it is larger than the sum of its proper divisors (30392935).

102515225 is a wasteful number, since it uses less digits than its factorization.

102515225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129 (or 2124 counting only the distinct ones).

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

The square root of 102515225 is about 10124.9802468943. The cubic root of 102515225 is about 468.0182514737.

The spelling of 102515225 in words is "one hundred two million, five hundred fifteen thousand, two hundred twenty-five".