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230131011 = 31131227991
BaseRepresentation
bin11011011011110…
…00010101000011
3121001000212101210
431231320111003
5432403143021
634500301203
75463036615
oct1555702503
9531025353
10230131011
111089a2920
12650a1803
13388a6ac6
14227c6db5
151530be76
hexdb78543

230131011 has 32 divisors (see below), whose sum is σ = 347406336. Its totient is φ = 134244000.

The previous prime is 230131007. The next prime is 230131019. The reversal of 230131011 is 110131032.

It is not a de Polignac number, because 230131011 - 22 = 230131007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (230131019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 231726 + ... + 232716.

It is an arithmetic number, because the mean of its divisors is an integer number (10856448).

Almost surely, 2230131011 is an apocalyptic number.

230131011 is a deficient number, since it is larger than the sum of its proper divisors (117275325).

230131011 is a wasteful number, since it uses less digits than its factorization.

230131011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 230131011 is about 15170.0695779551. The cubic root of 230131011 is about 612.8088780010.

Adding to 230131011 its reverse (110131032), we get a palindrome (340262043).

The spelling of 230131011 in words is "two hundred thirty million, one hundred thirty-one thousand, eleven".

Divisors: 1 3 11 31 33 93 227 341 681 991 1023 2497 2973 7037 7491 10901 21111 30721 32703 77407 92163 224957 232221 337931 674871 1013793 2474527 6973667 7423581 20921001 76710337 230131011