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230213031 = 3177957139
BaseRepresentation
bin11011011100011…
…00010110100111
3121001012000220120
431232030112213
5432413304111
634502133023
75463531006
oct1556142647
9531160816
10230213031
11108a49504
1265121173
1338905239
1422808c3d
1515326406
hexdb8c5a7

230213031 has 16 divisors (see below), whose sum is σ = 329126400. Its totient is φ = 142616448.

The previous prime is 230213023. The next prime is 230213041. The reversal of 230213031 is 130312032.

It is not a de Polignac number, because 230213031 - 23 = 230213023 is a prime.

It is a super-2 number, since 2×2302130312 = 105996079284413922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 230213031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230213041) 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, 24541 + ... + 32598.

It is an arithmetic number, because the mean of its divisors is an integer number (20570400).

Almost surely, 2230213031 is an apocalyptic number.

230213031 is a deficient number, since it is larger than the sum of its proper divisors (98913369).

230213031 is a wasteful number, since it uses less digits than its factorization.

230213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57238.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 230213031 is about 15172.7726866252. The cubic root of 230213031 is about 612.8816722090.

Adding to 230213031 its reverse (130312032), we get a palindrome (360525063).

Subtracting from 230213031 its reverse (130312032), we obtain a palindrome (99900999).

The spelling of 230213031 in words is "two hundred thirty million, two hundred thirteen thousand, thirty-one".

Divisors: 1 3 17 51 79 237 1343 4029 57139 171417 971363 2914089 4513981 13541943 76737677 230213031