312135145 has 32 divisors (see below), whose sum is σ = 448704000. Its totient is φ = 208208448.

The previous prime is 312135143. The next prime is 312135163. The reversal of 312135145 is 541531213.

It is a happy number.

It is not a de Polignac number, because 312135145 - 2¹ = 312135143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312135143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60996 + ... + 65914.

It is an arithmetic number, because the mean of its divisors is an integer number (14022000).

Almost surely, 2^312135145 is an apocalyptic number.

312135145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

312135145 is a deficient number, since it is larger than the sum of its proper divisors (136568855).

312135145 is an equidigital number, since it uses as much as digits as its factorization.

312135145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4982 (or 4968 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 312135145 is about 17667.3468579750. The cubic root of 312135145 is about 678.3402029434.

Adding to 312135145 its reverse (541531213), we get a palindrome (853666358).

The spelling of 312135145 in words is "three hundred twelve million, one hundred thirty-five thousand, one hundred forty-five".