31213213214 has 8 divisors (see below), whose sum is σ = 46821211320. Its totient is φ = 15606142776.

The previous prime is 31213213169. The next prime is 31213213217. The reversal of 31213213214 is 41231231213.

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

It is a super-3 number, since 3×31213213214³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31213213214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213213217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140609 + ... + 286700.

It is an arithmetic number, because the mean of its divisors is an integer number (5852651415).

Almost surely, 2^31213213214 is an apocalyptic number.

31213213214 is a deficient number, since it is larger than the sum of its proper divisors (15607998106).

31213213214 is a wasteful number, since it uses less digits than its factorization.

31213213214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463834.

The product of its digits is 864, while the sum is 23.

Adding to 31213213214 its reverse (41231231213), we get a palindrome (72444444427).

The spelling of 31213213214 in words is "thirty-one billion, two hundred thirteen million, two hundred thirteen thousand, two hundred fourteen".