102155225 has 12 divisors (see below), whose sum is σ = 126802896. Its totient is φ = 81640080.

The previous prime is 102155219. The next prime is 102155237. The reversal of 102155225 is 522551201.

It is not a de Polignac number, because 102155225 - 2⁶ = 102155161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102155225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36734 + ... + 39416.

It is an arithmetic number, because the mean of its divisors is an integer number (10566908).

Almost surely, 2^102155225 is an apocalyptic number.

It is an amenable number.

102155225 is a deficient number, since it is larger than the sum of its proper divisors (24647671).

102155225 is a wasteful number, since it uses less digits than its factorization.

102155225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4216 (or 4211 counting only the distinct ones).

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

The square root of 102155225 is about 10107.1867995006. The cubic root of 102155225 is about 467.4697665064.

The spelling of 102155225 in words is "one hundred two million, one hundred fifty-five thousand, two hundred twenty-five".