51405245212 has 48 divisors (see below), whose sum is σ = 91711065600. Its totient is φ = 25208426880.

The previous prime is 51405245191. The next prime is 51405245263. The reversal of 51405245212 is 21254250415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17406328 + ... + 17409280.

It is an arithmetic number, because the mean of its divisors is an integer number (1910647200).

Almost surely, 2^51405245212 is an apocalyptic number.

It is an amenable number.

51405245212 is a deficient number, since it is larger than the sum of its proper divisors (40305820388).

51405245212 is a wasteful number, since it uses less digits than its factorization.

51405245212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3466 (or 3464 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 51405245212 its reverse (21254250415), we get a palindrome (72659495627).

The spelling of 51405245212 in words is "fifty-one billion, four hundred five million, two hundred forty-five thousand, two hundred twelve".