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230431431 = 3290326459
BaseRepresentation
bin11011011110000…
…01101011000111
3121001121010111110
431233001223013
5432442301211
634510540103
75465430516
oct1557015307
9531533443
10230431431
111090885aa
1265207633
1338980779
142286467d
151536aea6
hexdbc1ac7

230431431 has 8 divisors (see below), whose sum is σ = 307359360. Its totient is φ = 153562232.

The previous prime is 230431417. The next prime is 230431433. The reversal of 230431431 is 134134032.

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 230431431 - 210 = 230430407 is a prime.

It is a super-2 number, since 2×2304314312 = 106197288785415522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 230431398 and 230431407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230431433) 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, 4521 + ... + 21938.

It is an arithmetic number, because the mean of its divisors is an integer number (38419920).

Almost surely, 2230431431 is an apocalyptic number.

230431431 is a deficient number, since it is larger than the sum of its proper divisors (76927929).

230431431 is a wasteful number, since it uses less digits than its factorization.

230431431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29365.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 230431431 is about 15179.9680829704. The cubic root of 230431431 is about 613.0754218137.

Adding to 230431431 its reverse (134134032), we get a palindrome (364565463).

The spelling of 230431431 in words is "two hundred thirty million, four hundred thirty-one thousand, four hundred thirty-one".

Divisors: 1 3 2903 8709 26459 79377 76810477 230431431