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232531 = 1331577
BaseRepresentation
bin111000110001010011
3102210222021
4320301103
524420111
64552311
71655635
oct706123
9383867
10232531
11149782
12b2697
1381ac0
1460a55
1548d71
hex38c53

232531 has 8 divisors (see below), whose sum is σ = 258944. Its totient is φ = 207360.

The previous prime is 232523. The next prime is 232549. The reversal of 232531 is 135232.

232531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a 9-Lehmer number, since φ(232531) divides (232531-1)9.

It is a cyclic number.

It is not a de Polignac number, because 232531 - 23 = 232523 is a prime.

It is a super-2 number, since 2×2325312 = 108141331922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (232571) 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, 115 + ... + 691.

It is an arithmetic number, because the mean of its divisors is an integer number (32368).

2232531 is an apocalyptic number.

232531 is a deficient number, since it is larger than the sum of its proper divisors (26413).

232531 is a wasteful number, since it uses less digits than its factorization.

232531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621.

The product of its digits is 180, while the sum is 16.

The square root of 232531 is about 482.2146824807. The cubic root of 232531 is about 61.4931801105.

Adding to 232531 its reverse (135232), we get a palindrome (367763).

The spelling of 232531 in words is "two hundred thirty-two thousand, five hundred thirty-one".

Divisors: 1 13 31 403 577 7501 17887 232531