313123142 has 4 divisors (see below), whose sum is σ = 469684716. Its totient is φ = 156561570.

The previous prime is 313123141. The next prime is 313123169. The reversal of 313123142 is 241321313.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×313123142² = 196092204111904328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313123141) 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 as a sum of consecutive naturals, namely, 78280784 + ... + 78280787.

It is an arithmetic number, because the mean of its divisors is an integer number (117421179).

Almost surely, 2^313123142 is an apocalyptic number.

313123142 is a deficient number, since it is larger than the sum of its proper divisors (156561574).

313123142 is a wasteful number, since it uses less digits than its factorization.

313123142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156561573.

The product of its digits is 432, while the sum is 20.

The square root of 313123142 is about 17695.2858694060. The cubic root of 313123142 is about 679.0551627017.

Adding to 313123142 its reverse (241321313), we get a palindrome (554444455).

The spelling of 313123142 in words is "three hundred thirteen million, one hundred twenty-three thousand, one hundred forty-two".