20310225 has 48 divisors (see below), whose sum is σ = 37205952. Its totient is φ = 9711360.

The previous prime is 20310217. The next prime is 20310247. The reversal of 20310225 is 52201302.

It is not a de Polignac number, because 20310225 - 2³ = 20310217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 35794 + ... + 36356.

It is an arithmetic number, because the mean of its divisors is an integer number (775124).

Almost surely, 2^20310225 is an apocalyptic number.

20310225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20310225 is a deficient number, since it is larger than the sum of its proper divisors (16895727).

20310225 is a wasteful number, since it uses less digits than its factorization.

20310225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20310225 is about 4506.6866986734. The cubic root of 20310225 is about 272.8380340514.

Adding to 20310225 its reverse (52201302), we get a palindrome (72511527).

The spelling of 20310225 in words is "twenty million, three hundred ten thousand, two hundred twenty-five".