312108381 has 24 divisors (see below), whose sum is σ = 491662080. Its totient is φ = 189629856.

The previous prime is 312108343. The next prime is 312108397. The reversal of 312108381 is 183801213.

It is not a de Polignac number, because 312108381 - 2⁶ = 312108317 is a prime.

It is a super-2 number, since 2×312108381² = 194823282980882322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312108301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7641 + ... + 26126.

It is an arithmetic number, because the mean of its divisors is an integer number (20485920).

Almost surely, 2^312108381 is an apocalyptic number.

It is an amenable number.

312108381 is a deficient number, since it is larger than the sum of its proper divisors (179553699).

312108381 is a wasteful number, since it uses less digits than its factorization.

312108381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33865 (or 33862 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 312108381 is about 17666.5893992021. The cubic root of 312108381 is about 678.3208143159.

Adding to 312108381 its reverse (183801213), we get a palindrome (495909594).

The spelling of 312108381 in words is "three hundred twelve million, one hundred eight thousand, three hundred eighty-one".