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31212421214 = 2131200477739
BaseRepresentation
bin11101000100011001…
…111100000001011110
32222120020200021121112
4131010121330001132
51002410334434324
622201102302022
72153321126402
oct350431740136
988506607545
1031212421214
1112267664037
126070b87912
132c356181c0
14172148d102
15c2a2b9c0e
hex74467c05e

31212421214 has 8 divisors (see below), whose sum is σ = 50420065080. Its totient is φ = 14405732856.

The previous prime is 31212421199. The next prime is 31212421241. The reversal of 31212421214 is 41212421213.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31212421214.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600238844 + ... + 600238895.

It is an arithmetic number, because the mean of its divisors is an integer number (6302508135).

Almost surely, 231212421214 is an apocalyptic number.

31212421214 is a deficient number, since it is larger than the sum of its proper divisors (19207643866).

31212421214 is a wasteful number, since it uses less digits than its factorization.

31212421214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200477754.

The product of its digits is 768, while the sum is 23.

Adding to 31212421214 its reverse (41212421213), we get a palindrome (72424842427).

Subtracting 31212421214 from its reverse (41212421213), we obtain a palindrome (9999999999).

The spelling of 31212421214 in words is "thirty-one billion, two hundred twelve million, four hundred twenty-one thousand, two hundred fourteen".

Divisors: 1 2 13 26 1200477739 2400955478 15606210607 31212421214