317213040 has 80 divisors (see below), whose sum is σ = 987936768. Its totient is φ = 84196608.

The previous prime is 317212967. The next prime is 317213053. The reversal of 317213040 is 40312713.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×317213040² = 201248225492083200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 317212998 and 317213016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50557 + ... + 56483.

Almost surely, 2^317213040 is an apocalyptic number.

317213040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 317213040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (493968384).

317213040 is an abundant number, since it is smaller than the sum of its proper divisors (670723728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

317213040 is a wasteful number, since it uses less digits than its factorization.

317213040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6166 (or 6160 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 317213040 is about 17810.4755691700. The cubic root of 317213040 is about 681.9989049498.

Adding to 317213040 its reverse (40312713), we get a palindrome (357525753).

The spelling of 317213040 in words is "three hundred seventeen million, two hundred thirteen thousand, forty".