312021225 has 36 divisors (see below), whose sum is σ = 560492400. Its totient is φ = 165926880.

The previous prime is 312021217. The next prime is 312021239. The reversal of 312021225 is 522120213.

It is not a de Polignac number, because 312021225 - 2³ = 312021217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312021198 and 312021207.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 83446 + ... + 87104.

Almost surely, 2^312021225 is an apocalyptic number.

It is an amenable number.

312021225 is a deficient number, since it is larger than the sum of its proper divisors (248471175).

312021225 is a wasteful number, since it uses less digits than its factorization.

312021225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054 (or 4046 counting only the distinct ones).

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

The square root of 312021225 is about 17664.1225369391. The cubic root of 312021225 is about 678.2576682675.

Adding to 312021225 its reverse (522120213), we get a palindrome (834141438).

The spelling of 312021225 in words is "three hundred twelve million, twenty-one thousand, two hundred twenty-five".