313148381 has 48 divisors (see below), whose sum is σ = 428799744. Its totient is φ = 222723072.

The previous prime is 313148377. The next prime is 313148399. The reversal of 313148381 is 183841313.

It is not a de Polignac number, because 313148381 - 2² = 313148377 is a prime.

It is a super-2 number, since 2×313148381² = 196123817045842322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313148321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 462215 + ... + 462891.

It is an arithmetic number, because the mean of its divisors is an integer number (8933328).

Almost surely, 2^313148381 is an apocalyptic number.

It is an amenable number.

313148381 is a deficient number, since it is larger than the sum of its proper divisors (115651363).

313148381 is a wasteful number, since it uses less digits than its factorization.

313148381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750 (or 737 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 313148381 is about 17695.9990110759. Note that the first 3 decimals coincide. The cubic root of 313148381 is about 679.0734070817.

Adding to 313148381 its reverse (183841313), we get a palindrome (496989694).

The spelling of 313148381 in words is "three hundred thirteen million, one hundred forty-eight thousand, three hundred eighty-one".