103212225 has 30 divisors (see below), whose sum is σ = 191188470. Its totient is φ = 55045440.

The previous prime is 103212223. The next prime is 103212229. The reversal of 103212225 is 522212301.

It can be written as a sum of positive squares in 3 ways, for example, as 331776 + 102880449 = 576^2 + 10143^2 .

It is not a de Polignac number, because 103212225 - 2¹ = 103212223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103212198 and 103212207.

It is not an unprimeable number, because it can be changed into a prime (103212223) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 23460 + ... + 27509.

It is an arithmetic number, because the mean of its divisors is an integer number (6372949).

Almost surely, 2^103212225 is an apocalyptic number.

103212225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

103212225 is a deficient number, since it is larger than the sum of its proper divisors (87976245).

103212225 is an equidigital number, since it uses as much as digits as its factorization.

103212225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50991 (or 50977 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 103212225 is about 10159.3417601732. The cubic root of 103212225 is about 469.0765404727.

Adding to 103212225 its reverse (522212301), we get a palindrome (625424526).

The spelling of 103212225 in words is "one hundred three million, two hundred twelve thousand, two hundred twenty-five".