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128150751 = 3271157627
BaseRepresentation
bin1111010001101…
…10110011011111
322221010201210010
413220312303133
5230301311001
620414414303
73114156231
oct750666337
9287121703
10128150751
1166379613
1236b01393
132071bb61
141303c251
15b3b58d6
hex7a36cdf

128150751 has 8 divisors (see below), whose sum is σ = 171499264. Its totient is φ = 85118040.

The previous prime is 128150689. The next prime is 128150753. The reversal of 128150751 is 157051821.

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

It is not a de Polignac number, because 128150751 - 225 = 94596319 is a prime.

It is a super-2 number, since 2×1281507512 = 32845229963728002, 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 (128150753) 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, 78001 + ... + 79626.

It is an arithmetic number, because the mean of its divisors is an integer number (21437408).

Almost surely, 2128150751 is an apocalyptic number.

128150751 is a deficient number, since it is larger than the sum of its proper divisors (43348513).

128150751 is a wasteful number, since it uses less digits than its factorization.

128150751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157901.

The product of its (nonzero) digits is 2800, while the sum is 30.

The square root of 128150751 is about 11320.3688544146. The cubic root of 128150751 is about 504.1661906271.

The spelling of 128150751 in words is "one hundred twenty-eight million, one hundred fifty thousand, seven hundred fifty-one".

Divisors: 1 3 271 813 157627 472881 42716917 128150751