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317916220 = 22515895811
BaseRepresentation
bin10010111100110…
…000010000111100
3211011012211001211
4102330300100330
51122341304340
651314014204
710610146306
oct2274602074
9734184054
10317916220
11153501186
128a577364
1350b3190b
1430318976
151cd9c5ea
hex12f3043c

317916220 has 12 divisors (see below), whose sum is σ = 667624104. Its totient is φ = 127166480.

The previous prime is 317916217. The next prime is 317916223. The reversal of 317916220 is 22619713.

It is an interprime number because it is at equal distance from previous prime (317916217) and next prime (317916223).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317916223) 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 in 3 ways as a sum of consecutive naturals, for example, 7947886 + ... + 7947925.

It is an arithmetic number, because the mean of its divisors is an integer number (55635342).

Almost surely, 2317916220 is an apocalyptic number.

It is an amenable number.

317916220 is an abundant number, since it is smaller than the sum of its proper divisors (349707884).

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

317916220 is a wasteful number, since it uses less digits than its factorization.

317916220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15895820 (or 15895818 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 317916220 is about 17830.2052708319. The cubic root of 317916220 is about 682.5024719595.

The spelling of 317916220 in words is "three hundred seventeen million, nine hundred sixteen thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 15895811 31791622 63583244 79479055 158958110 317916220