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31121414313 = 3111396784699
BaseRepresentation
bin11100111110111110…
…110001100010101001
32222022220102122121120
4130332332301202221
51002214040224223
622144051525453
72151134441223
oct347676614251
988286378546
1031121414313
1112220255220
1260465b9889
132c1c802b72
14171335d413
15c222debe3
hex73efb18a9

31121414313 has 16 divisors (see below), whose sum is σ = 45593184000. Its totient is φ = 18725766480.

The previous prime is 31121414281. The next prime is 31121414329. The reversal of 31121414313 is 31341412113.

It is a happy number.

It is not a de Polignac number, because 31121414313 - 25 = 31121414281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31121414353) 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, 3387763 + ... + 3396936.

It is an arithmetic number, because the mean of its divisors is an integer number (2849574000).

Almost surely, 231121414313 is an apocalyptic number.

31121414313 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31121414313 is a deficient number, since it is larger than the sum of its proper divisors (14471769687).

31121414313 is a wasteful number, since it uses less digits than its factorization.

31121414313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6784852.

The product of its digits is 864, while the sum is 24.

Adding to 31121414313 its reverse (31341412113), we get a palindrome (62462826426).

The spelling of 31121414313 in words is "thirty-one billion, one hundred twenty-one million, four hundred fourteen thousand, three hundred thirteen".

Divisors: 1 3 11 33 139 417 1529 4587 6784699 20354097 74631689 223895067 943073161 2829219483 10373804771 31121414313