312742381 has 8 divisors (see below), whose sum is σ = 357541184. Its totient is φ = 267973920.

The previous prime is 312742363. The next prime is 312742393. The reversal of 312742381 is 183247213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312742381 - 2⁵ = 312742349 is a prime.

It is a super-2 number, since 2×312742381² = 195615593747098322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312742361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22441 + ... + 33601.

It is an arithmetic number, because the mean of its divisors is an integer number (44692648).

Almost surely, 2^312742381 is an apocalyptic number.

It is an amenable number.

312742381 is a deficient number, since it is larger than the sum of its proper divisors (44798803).

312742381 is a wasteful number, since it uses less digits than its factorization.

312742381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15171.

The product of its digits is 8064, while the sum is 31.

The square root of 312742381 is about 17684.5237708003. The cubic root of 312742381 is about 678.7798050101.

Adding to 312742381 its reverse (183247213), we get a palindrome (495989594).

The spelling of 312742381 in words is "three hundred twelve million, seven hundred forty-two thousand, three hundred eighty-one".