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222312013 = 71113920771
BaseRepresentation
bin11010100000000…
…11011001001101
3120111022121202021
431100003121031
5423402441023
634020530141
75336422660
oct1520033115
9514277667
10222312013
11104542340
1262550951
1337099b91
142174d6d7
15147b535d
hexd40364d

222312013 has 16 divisors (see below), whose sum is σ = 279175680. Its totient is φ = 171975600.

The previous prime is 222312011. The next prime is 222312029. The reversal of 222312013 is 310213222.

It is a cyclic number.

It is not a de Polignac number, because 222312013 - 21 = 222312011 is a prime.

It is a super-2 number, since 2×2223120132 = 98845262248224338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222312011) 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, 318 + ... + 21088.

It is an arithmetic number, because the mean of its divisors is an integer number (17448480).

Almost surely, 2222312013 is an apocalyptic number.

It is an amenable number.

222312013 is a deficient number, since it is larger than the sum of its proper divisors (56863667).

222312013 is a wasteful number, since it uses less digits than its factorization.

222312013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20928.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 222312013 is about 14910.1312200799. The cubic root of 222312013 is about 605.7884336278.

Adding to 222312013 its reverse (310213222), we get a palindrome (532525235).

The spelling of 222312013 in words is "two hundred twenty-two million, three hundred twelve thousand, thirteen".

Divisors: 1 7 11 77 139 973 1529 10703 20771 145397 228481 1599367 2887169 20210183 31758859 222312013