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230901231 = 31153132019
BaseRepresentation
bin11011100001101…
…00010111101111
3121002110222221110
431300310113233
5433102314411
634525003103
75502425301
oct1560642757
9532428843
10230901231
11109379570
12653b3493
1338ab6562
1422947971
15154102a6
hexdc345ef

230901231 has 16 divisors (see below), whose sum is σ = 342195840. Its totient is φ = 137298720.

The previous prime is 230901211. The next prime is 230901241. The reversal of 230901231 is 132109032.

It is a happy number.

It is not a de Polignac number, because 230901231 - 211 = 230899183 is a prime.

It is a super-2 number, since 2×2309012312 = 106630756954630722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 230901198 and 230901207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230901211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64261 + ... + 67758.

It is an arithmetic number, because the mean of its divisors is an integer number (21387240).

Almost surely, 2230901231 is an apocalyptic number.

230901231 is a deficient number, since it is larger than the sum of its proper divisors (111294609).

230901231 is a wasteful number, since it uses less digits than its factorization.

230901231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132086.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 230901231 is about 15195.4345446256. The cubic root of 230901231 is about 613.4917818483.

It can be divided in two parts, 230901 and 231, that added together give a palindrome (231132).

The spelling of 230901231 in words is "two hundred thirty million, nine hundred one thousand, two hundred thirty-one".

Divisors: 1 3 11 33 53 159 583 1749 132019 396057 1452209 4356627 6997007 20991021 76967077 230901231