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230032431 = 3231824489
BaseRepresentation
bin11011011011000…
…00010000101111
3121000211212011200
431231200100233
5432342014211
634454220543
75462146326
oct1555402057
9530755150
10230032431
11108935852
1265054753
1338870c85
142279d0bd
15152dcb56
hexdb6042f

230032431 has 12 divisors (see below), whose sum is σ = 342987840. Its totient is φ = 148407840.

The previous prime is 230032399. The next prime is 230032459. The reversal of 230032431 is 134230032.

230032431 is a `hidden beast` number, since 230 + 0 + 3 + 2 + 431 = 666.

230032431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 230032431 - 25 = 230032399 is a prime.

It is a super-2 number, since 2×2300324312 = 105829838623539522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230032931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 411966 + ... + 412523.

It is an arithmetic number, because the mean of its divisors is an integer number (28582320).

Almost surely, 2230032431 is an apocalyptic number.

230032431 is a deficient number, since it is larger than the sum of its proper divisors (112955409).

230032431 is a wasteful number, since it uses less digits than its factorization.

230032431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824526 (or 824523 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 230032431 is about 15166.8200688213. The cubic root of 230032431 is about 612.7213636081.

Adding to 230032431 its reverse (134230032), we get a palindrome (364262463).

The spelling of 230032431 in words is "two hundred thirty million, thirty-two thousand, four hundred thirty-one".

Divisors: 1 3 9 31 93 279 824489 2473467 7420401 25559159 76677477 230032431