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2556243 = 322353233
BaseRepresentation
bin1001110000000101010011
311210212111200
421300011103
51123244433
6130442243
730504414
oct11600523
94725450
102556243
1114965a8
12a33383
136b6691
144a780b
15357613
hex270153

2556243 has 24 divisors (see below), whose sum is σ = 3942432. Its totient is φ = 1592448.

The previous prime is 2556233. The next prime is 2556259. The reversal of 2556243 is 3426552.

It is not a de Polignac number, because 2556243 - 26 = 2556179 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2556233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10855 + ... + 11087.

It is an arithmetic number, because the mean of its divisors is an integer number (164268).

22556243 is an apocalyptic number.

2556243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2556243 is a deficient number, since it is larger than the sum of its proper divisors (1386189).

2556243 is a wasteful number, since it uses less digits than its factorization.

2556243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 312 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 2556243 is about 1598.8255064265. The cubic root of 2556243 is about 136.7311223492.

The spelling of 2556243 in words is "two million, five hundred fifty-six thousand, two hundred forty-three".

Divisors: 1 3 9 23 53 69 159 207 233 477 699 1219 2097 3657 5359 10971 12349 16077 37047 48231 111141 284027 852081 2556243