51351635261212 has 72 divisors (see below), whose sum is σ = 106807445095680. Its totient is φ = 21413955251520.

The previous prime is 51351635261183. The next prime is 51351635261221. The reversal of 51351635261212 is 21216253615315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19971412 + ... + 22395547.

It is an arithmetic number, because the mean of its divisors is an integer number (1483436737440).

Almost surely, 2^{51351635261212} is an apocalyptic number.

51351635261212 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51351635261212 is an abundant number, since it is smaller than the sum of its proper divisors (55455809834468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51351635261212 is a wasteful number, since it uses less digits than its factorization.

51351635261212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42367163 (or 42367148 counting only the distinct ones).

The product of its digits is 324000, while the sum is 43.

Adding to 51351635261212 its reverse (21216253615315), we get a palindrome (72567888876527).

The spelling of 51351635261212 in words is "fifty-one trillion, three hundred fifty-one billion, six hundred thirty-five million, two hundred sixty-one thousand, two hundred twelve".