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312431 = 744633
BaseRepresentation
bin1001100010001101111
3120212120112
41030101233
534444211
610410235
72440610
oct1142157
9525515
10312431
111a3809
1213097b
13ac292
1481c07
156288b
hex4c46f

312431 has 4 divisors (see below), whose sum is σ = 357072. Its totient is φ = 267792.

The previous prime is 312427. The next prime is 312451. The reversal of 312431 is 134213.

Adding to 312431 its sum of digits (14), we get a triangular number (312445 = T790).

Adding to 312431 its reverse (134213), we get a palindrome (446644).

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 312431 - 22 = 312427 is a prime.

It is a super-2 number, since 2×3124312 = 195226259522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312431.

It is not an unprimeable number, because it can be changed into a prime (312401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22310 + ... + 22323.

It is an arithmetic number, because the mean of its divisors is an integer number (89268).

2312431 is an apocalyptic number.

312431 is a deficient number, since it is larger than the sum of its proper divisors (44641).

312431 is an equidigital number, since it uses as much as digits as its factorization.

312431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44640.

The product of its digits is 72, while the sum is 14.

The square root of 312431 is about 558.9552754917. The cubic root of 312431 is about 67.8554455188.

The spelling of 312431 in words is "three hundred twelve thousand, four hundred thirty-one".

Divisors: 1 7 44633 312431