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31268055 = 3571322907
BaseRepresentation
bin111011101000…
…1110011010111
32011211120201010
41313101303113
531001034210
63034103303
7526526340
oct167216327
964746633
1031268055
1116717175
12a57ab33
13662a210
14421d0c7
152b29920
hex1dd1cd7

31268055 has 32 divisors (see below), whose sum is σ = 61576704. Its totient is φ = 13193856.

The previous prime is 31268011. The next prime is 31268059. The reversal of 31268055 is 55086213.

It is not a de Polignac number, because 31268055 - 27 = 31267927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31268059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10089 + ... + 12818.

It is an arithmetic number, because the mean of its divisors is an integer number (1924272).

Almost surely, 231268055 is an apocalyptic number.

31268055 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

31268055 is a deficient number, since it is larger than the sum of its proper divisors (30308649).

31268055 is a wasteful number, since it uses less digits than its factorization.

31268055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22935.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 31268055 is about 5591.7845988557. The cubic root of 31268055 is about 315.0409117938.

The spelling of 31268055 in words is "thirty-one million, two hundred sixty-eight thousand, fifty-five".

Divisors: 1 3 5 7 13 15 21 35 39 65 91 105 195 273 455 1365 22907 68721 114535 160349 297791 343605 481047 801745 893373 1488955 2084537 2405235 4466865 6253611 10422685 31268055