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31680095 = 517372707
BaseRepresentation
bin111100011011…
…0011001011111
32012121111220212
41320312121133
531102230340
63051003035
7533163536
oct170663137
965544825
1031680095
11169787a7
12a73947b
136742925
1442c931d
152baba65
hex1e3665f

31680095 has 8 divisors (see below), whose sum is σ = 40252464. Its totient is φ = 23853184.

The previous prime is 31680091. The next prime is 31680097. The reversal of 31680095 is 59008613.

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

It is a cyclic number.

It is not a de Polignac number, because 31680095 - 22 = 31680091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31680091) 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, 186269 + ... + 186438.

It is an arithmetic number, because the mean of its divisors is an integer number (5031558).

Almost surely, 231680095 is an apocalyptic number.

31680095 is a deficient number, since it is larger than the sum of its proper divisors (8572369).

31680095 is a wasteful number, since it uses less digits than its factorization.

31680095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372729.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 31680095 is about 5628.5073509768. The cubic root of 31680095 is about 316.4187120235.

The spelling of 31680095 in words is "thirty-one million, six hundred eighty thousand, ninety-five".

Divisors: 1 5 17 85 372707 1863535 6336019 31680095