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230021013 = 3490915619
BaseRepresentation
bin11011011010111…
…01011110010101
3121000211021111210
431231131132111
5432341133023
634454052033
75462101125
oct1555353625
9530737453
10230021013
11108928212
126504a019
1338868a11
1422798c85
15152d9593
hexdb5d795

230021013 has 8 divisors (see below), whose sum is σ = 306776800. Its totient is φ = 153306288.

The previous prime is 230020997. The next prime is 230021027. The reversal of 230021013 is 310120032.

It is a happy number.

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

It is not a de Polignac number, because 230021013 - 24 = 230020997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 230021013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230021063) 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, 6918 + ... + 22536.

It is an arithmetic number, because the mean of its divisors is an integer number (38347100).

Almost surely, 2230021013 is an apocalyptic number.

It is an amenable number.

230021013 is a deficient number, since it is larger than the sum of its proper divisors (76755787).

230021013 is a wasteful number, since it uses less digits than its factorization.

230021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20531.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 230021013 is about 15166.4436503750. The cubic root of 230021013 is about 612.7112256632.

Adding to 230021013 its reverse (310120032), we get a palindrome (540141045).

The spelling of 230021013 in words is "two hundred thirty million, twenty-one thousand, thirteen".

Divisors: 1 3 4909 14727 15619 46857 76673671 230021013