313138642 has 8 divisors (see below), whose sum is σ = 480631536. Its totient is φ = 152928132.

The previous prime is 313138633. The next prime is 313138649. The reversal of 313138642 is 246831313.

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

It is a super-2 number, since 2×313138642² = 196111618227208328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (313138649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1820488 + ... + 1820659.

It is an arithmetic number, because the mean of its divisors is an integer number (60078942).

Almost surely, 2^313138642 is an apocalyptic number.

313138642 is a deficient number, since it is larger than the sum of its proper divisors (167492894).

313138642 is a wasteful number, since it uses less digits than its factorization.

313138642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3641192.

The product of its digits is 10368, while the sum is 31.

The square root of 313138642 is about 17695.7238337402. The cubic root of 313138642 is about 679.0663672193.

Adding to 313138642 its reverse (246831313), we get a palindrome (559969955).

The spelling of 313138642 in words is "three hundred thirteen million, one hundred thirty-eight thousand, six hundred forty-two".