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268471031 = 1491801819
BaseRepresentation
bin10000000000001…
…000101011110111
3200201011202000112
4100000020223313
51022212033111
642350133235
76436652243
oct2000105367
9621152015
10268471031
111285aa294
1275ab121b
134380bbca
1427927423
1518881e8b
hex10008af7

268471031 has 4 divisors (see below), whose sum is σ = 270273000. Its totient is φ = 266669064.

The previous prime is 268470997. The next prime is 268471039. The reversal of 268471031 is 130174862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-268471031 is a prime.

It is a super-2 number, since 2×2684710312 = 144153388972405922, 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 (268471039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900761 + ... + 901058.

It is an arithmetic number, because the mean of its divisors is an integer number (67568250).

Almost surely, 2268471031 is an apocalyptic number.

268471031 is a deficient number, since it is larger than the sum of its proper divisors (1801969).

268471031 is a wasteful number, since it uses less digits than its factorization.

268471031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801968.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 268471031 is about 16385.0856268742. The cubic root of 268471031 is about 645.1080731513.

The spelling of 268471031 in words is "two hundred sixty-eight million, four hundred seventy-one thousand, thirty-one".

Divisors: 1 149 1801819 268471031