102131225 has 24 divisors (see below), whose sum is σ = 145282368. Its totient is φ = 69768000.

The previous prime is 102131219. The next prime is 102131231. The reversal of 102131225 is 522131201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (102131219) and next prime (102131231).

It is not a de Polignac number, because 102131225 - 2⁴ = 102131209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52775 + ... + 54675.

It is an arithmetic number, because the mean of its divisors is an integer number (6053432).

Almost surely, 2^102131225 is an apocalyptic number.

It is an amenable number.

102131225 is a deficient number, since it is larger than the sum of its proper divisors (43151143).

102131225 is a wasteful number, since it uses less digits than its factorization.

102131225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225 (or 2220 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 102131225 is about 10105.9994557688. Note that the first 3 decimals coincide. The cubic root of 102131225 is about 467.4331550552.

Adding to 102131225 its reverse (522131201), we get a palindrome (624262426).

The spelling of 102131225 in words is "one hundred two million, one hundred thirty-one thousand, two hundred twenty-five".