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256531634 = 2314137607
BaseRepresentation
bin11110100101001…
…01110010110010
3122212201011020122
433102211302302
51011133003014
641242210242
76233324432
oct1722456262
9585634218
10256531634
11121895017
1271ab3982
13411bb688
14260da2c2
15177c458e
hexf4a5cb2

256531634 has 8 divisors (see below), whose sum is σ = 397210368. Its totient is φ = 124128180.

The previous prime is 256531601. The next prime is 256531637. The reversal of 256531634 is 436135652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256531594 and 256531603.

It is not an unprimeable number, because it can be changed into a prime (256531637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068742 + ... + 2068865.

It is an arithmetic number, because the mean of its divisors is an integer number (49651296).

Almost surely, 2256531634 is an apocalyptic number.

256531634 is a deficient number, since it is larger than the sum of its proper divisors (140678734).

256531634 is a wasteful number, since it uses less digits than its factorization.

256531634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137640.

The product of its digits is 64800, while the sum is 35.

The square root of 256531634 is about 16016.6049461176. The cubic root of 256531634 is about 635.3996566509.

The spelling of 256531634 in words is "two hundred fifty-six million, five hundred thirty-one thousand, six hundred thirty-four".

Divisors: 1 2 31 62 4137607 8275214 128265817 256531634