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81046330 = 2547172439
BaseRepresentation
bin1001101010010…
…10101100111010
312122111120122221
410311022230322
5131221440310
612013034254
72002611451
oct465125472
9178446587
1081046330
1141826342
122318598a
1313a38711
14aa99b98
1571adada
hex4d4ab3a

81046330 has 16 divisors (see below), whose sum is σ = 148988160. Its totient is φ = 31728592.

The previous prime is 81046291. The next prime is 81046333. The reversal of 81046330 is 3364018.

It is a junction number, because it is equal to n+sod(n) for n = 81046295 and 81046304.

It is not an unprimeable number, because it can be changed into a prime (81046333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85750 + ... + 86689.

It is an arithmetic number, because the mean of its divisors is an integer number (9311760).

Almost surely, 281046330 is an apocalyptic number.

81046330 is a deficient number, since it is larger than the sum of its proper divisors (67941830).

81046330 is a wasteful number, since it uses less digits than its factorization.

81046330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172493.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 81046330 is about 9002.5735209439. The cubic root of 81046330 is about 432.7573484835.

The spelling of 81046330 in words is "eighty-one million, forty-six thousand, three hundred thirty".

Divisors: 1 2 5 10 47 94 235 470 172439 344878 862195 1724390 8104633 16209266 40523165 81046330