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243331001 = 1163209227
BaseRepresentation
bin11101000000011…
…10111110111001
3121221212111101022
432200032332321
5444243043001
640051232225
76013164554
oct1640167671
9557774338
10243331001
11115399201
12695a8675
133b549054
142446169b
151656811b
hexe80efb9

243331001 has 4 divisors (see below), whose sum is σ = 243541392. Its totient is φ = 243120612.

The previous prime is 243330991. The next prime is 243331087. The reversal of 243331001 is 100133342.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-243331001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243331091) 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, 103451 + ... + 105776.

It is an arithmetic number, because the mean of its divisors is an integer number (60885348).

Almost surely, 2243331001 is an apocalyptic number.

It is an amenable number.

243331001 is a deficient number, since it is larger than the sum of its proper divisors (210391).

243331001 is a wasteful number, since it uses less digits than its factorization.

243331001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210390.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 243331001 is about 15599.0705171815. The cubic root of 243331001 is about 624.3083557408.

Adding to 243331001 its reverse (100133342), we get a palindrome (343464343).

The spelling of 243331001 in words is "two hundred forty-three million, three hundred thirty-one thousand, one".

Divisors: 1 1163 209227 243331001