212937731690 has 8 divisors (see below), whose sum is σ = 383287917060. Its totient is φ = 85175092672.

The previous prime is 212937731689. The next prime is 212937731693. The reversal of 212937731690 is 96137739212.

212937731690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 212745105049 + 192626641 = 461243^2 + 13879^2 .

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

It is a super-2 number, since 2×212937731690² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212937731693) 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, 10646886575 + ... + 10646886594.

Almost surely, 2^212937731690 is an apocalyptic number.

212937731690 is a deficient number, since it is larger than the sum of its proper divisors (170350185370).

212937731690 is a wasteful number, since it uses less digits than its factorization.

212937731690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21293773176.

The product of its (nonzero) digits is 857304, while the sum is 50.

The spelling of 212937731690 in words is "two hundred twelve billion, nine hundred thirty-seven million, seven hundred thirty-one thousand, six hundred ninety".