251340212212 has 6 divisors (see below), whose sum is σ = 439845371378. Its totient is φ = 125670106104.

The previous prime is 251340212197. The next prime is 251340212243. The reversal of 251340212212 is 212212043152.

251340212212 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 only one way, i.e., 151456402276 + 99883809936 = 389174^2 + 316044^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 31417526523 + ... + 31417526530.

Almost surely, 2^251340212212 is an apocalyptic number.

It is an amenable number.

251340212212 is a deficient number, since it is larger than the sum of its proper divisors (188505159166).

251340212212 is a wasteful number, since it uses less digits than its factorization.

251340212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62835053057 (or 62835053055 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 251340212212 its reverse (212212043152), we get a palindrome (463552255364).

The spelling of 251340212212 in words is "two hundred fifty-one billion, three hundred forty million, two hundred twelve thousand, two hundred twelve".