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230020047 = 3317501133
BaseRepresentation
bin11011011010111…
…01001111001111
3121000211020012000
431231131033033
5432341120142
634454043343
75462065245
oct1555351717
9530736160
10230020047
11108927514
1265049553
133886844a
1422798795
15152d914c
hexdb5d3cf

230020047 has 16 divisors (see below), whose sum is σ = 360816480. Its totient is φ = 144326016.

The previous prime is 230020039. The next prime is 230020067. The reversal of 230020047 is 740020032.

It is a happy number.

It is not a de Polignac number, because 230020047 - 23 = 230020039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230020067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250108 + ... + 251025.

It is an arithmetic number, because the mean of its divisors is an integer number (22551030).

Almost surely, 2230020047 is an apocalyptic number.

230020047 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

230020047 is a deficient number, since it is larger than the sum of its proper divisors (130796433).

230020047 is a wasteful number, since it uses less digits than its factorization.

230020047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501159 (or 501153 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 230020047 is about 15166.4118037194. The cubic root of 230020047 is about 612.7103679447.

Adding to 230020047 its reverse (740020032), we get a palindrome (970040079).

The spelling of 230020047 in words is "two hundred thirty million, twenty thousand, forty-seven".

Divisors: 1 3 9 17 27 51 153 459 501133 1503399 4510197 8519261 13530591 25557783 76673349 230020047