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14280031 = 99714323
BaseRepresentation
bin110110011110…
…010101011111
3222212111112001
4312132111133
512123430111
61230023131
7232243513
oct66362537
928774461
1014280031
118073887
124947aa7
132c5ca2c
141c7a143
1513c11c1
hexd9e55f

14280031 has 4 divisors (see below), whose sum is σ = 14295352. Its totient is φ = 14264712.

The previous prime is 14280029. The next prime is 14280043. The reversal of 14280031 is 13008241.

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

It is a cyclic number.

It is not a de Polignac number, because 14280031 - 21 = 14280029 is a prime.

It is a super-2 number, since 2×142800312 = 407838570721922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 14279990 and 14280008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14280131) 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, 6165 + ... + 8158.

It is an arithmetic number, because the mean of its divisors is an integer number (3573838).

Almost surely, 214280031 is an apocalyptic number.

14280031 is a deficient number, since it is larger than the sum of its proper divisors (15321).

14280031 is an equidigital number, since it uses as much as digits as its factorization.

14280031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15320.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 14280031 is about 3778.8928272710. The cubic root of 14280031 is about 242.6105691972.

Adding to 14280031 its reverse (13008241), we get a palindrome (27288272).

It can be divided in two parts, 142800 and 31, that multiplied together give a triangular number (4426800 = T2975).

The spelling of 14280031 in words is "fourteen million, two hundred eighty thousand, thirty-one".

Divisors: 1 997 14323 14280031