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270831 = 31129283
BaseRepresentation
bin1000010000111101111
3111202111210
41002013233
532131311
65445503
72205411
oct1020757
9452453
10270831
11175530
12110893
1396372
14709b1
15553a6
hex421ef

270831 has 16 divisors (see below), whose sum is σ = 408960. Its totient is φ = 157920.

The previous prime is 270821. The next prime is 270833. The reversal of 270831 is 138072.

It is not a de Polignac number, because 270831 - 25 = 270799 is a prime.

It is a super-2 number, since 2×2708312 = 146698861122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 270798 and 270807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (270833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 816 + ... + 1098.

It is an arithmetic number, because the mean of its divisors is an integer number (25560).

2270831 is an apocalyptic number.

270831 is a deficient number, since it is larger than the sum of its proper divisors (138129).

270831 is a wasteful number, since it uses less digits than its factorization.

270831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 270831 is about 520.4142580676. The cubic root of 270831 is about 64.6992815013.

The spelling of 270831 in words is "two hundred seventy thousand, eight hundred thirty-one".

Divisors: 1 3 11 29 33 87 283 319 849 957 3113 8207 9339 24621 90277 270831