313784531 has 4 divisors (see below), whose sum is σ = 322265232. Its totient is φ = 305303832.

The previous prime is 313784519. The next prime is 313784557. The reversal of 313784531 is 135487313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135487313 = 13 ⋅10422101.

It is a cyclic number.

It is not a de Polignac number, because 313784531 - 2¹⁸ = 313522387 is a prime.

It is a super-2 number, since 2×313784531² = 196921463789779922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313784491 and 313784500.

It is not an unprimeable number, because it can be changed into a prime (313784591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4240295 + ... + 4240368.

It is an arithmetic number, because the mean of its divisors is an integer number (80566308).

Almost surely, 2^313784531 is an apocalyptic number.

313784531 is a deficient number, since it is larger than the sum of its proper divisors (8480701).

313784531 is an equidigital number, since it uses as much as digits as its factorization.

313784531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8480700.

The product of its digits is 30240, while the sum is 35.

The square root of 313784531 is about 17713.9642937429. The cubic root of 313784531 is about 679.5329340215.

The spelling of 313784531 in words is "three hundred thirteen million, seven hundred eighty-four thousand, five hundred thirty-one".