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31102012223 = 232335803697
BaseRepresentation
bin11100111101110100…
…110000101100111111
32222021112220220221122
4130331310300230333
51002144103342343
622142120021155
72150510512322
oct347564605477
988245826848
1031102012223
1112210303137
1260400017bb
132c1879b939
14171094c7b9
15c2075b068
hex73dd30b3f

31102012223 has 8 divisors (see below), whose sum is σ = 32593567968. Its totient is φ = 29622064384.

The previous prime is 31102012181. The next prime is 31102012231. The reversal of 31102012223 is 32221020113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31102012223 - 226 = 31034903359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31102002223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2896490 + ... + 2907207.

It is an arithmetic number, because the mean of its divisors is an integer number (4074195996).

Almost surely, 231102012223 is an apocalyptic number.

31102012223 is a deficient number, since it is larger than the sum of its proper divisors (1491555745).

31102012223 is a wasteful number, since it uses less digits than its factorization.

31102012223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5803953.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31102012223 its reverse (32221020113), we get a palindrome (63323032336).

The spelling of 31102012223 in words is "thirty-one billion, one hundred two million, twelve thousand, two hundred twenty-three".

Divisors: 1 23 233 5359 5803697 133485031 1352261401 31102012223