312011225 has 12 divisors (see below), whose sum is σ = 395892816. Its totient is φ = 243803280.

The previous prime is 312011213. The next prime is 312011257. The reversal of 312011225 is 522110213.

It is a happy number.

It is not a de Polignac number, because 312011225 - 2¹⁰ = 312010201 is a prime.

It is a Duffinian number.

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, 144047 + ... + 146196.

It is an arithmetic number, because the mean of its divisors is an integer number (32991068).

Almost surely, 2^312011225 is an apocalyptic number.

It is an amenable number.

312011225 is a deficient number, since it is larger than the sum of its proper divisors (83881591).

312011225 is a wasteful number, since it uses less digits than its factorization.

312011225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290296 (or 290291 counting only the distinct ones).

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

The square root of 312011225 is about 17663.8394750405. The cubic root of 312011225 is about 678.2504223404.

Adding to 312011225 its reverse (522110213), we get a palindrome (834121438).

The spelling of 312011225 in words is "three hundred twelve million, eleven thousand, two hundred twenty-five".