312225131 has 2 divisors, whose sum is σ = 312225132. Its totient is φ = 312225130.

The previous prime is 312225113. The next prime is 312225139. The reversal of 312225131 is 131522213.

Together with previous prime (312225113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (131522213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312225131 - 2¹⁴ = 312208747 is a prime.

It is a super-2 number, since 2×312225131² = 194969064855934322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312225139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156112565 + 156112566.

It is an arithmetic number, because the mean of its divisors is an integer number (156112566).

Almost surely, 2^312225131 is an apocalyptic number.

312225131 is a deficient number, since it is larger than the sum of its proper divisors (1).

312225131 is an equidigital number, since it uses as much as digits as its factorization.

312225131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 20.

The square root of 312225131 is about 17669.8933499894. The cubic root of 312225131 is about 678.4053833175.

Adding to 312225131 its reverse (131522213), we get a palindrome (443747344).

The spelling of 312225131 in words is "three hundred twelve million, two hundred twenty-five thousand, one hundred thirty-one".