51212451242 has 16 divisors (see below), whose sum is σ = 76980987360. Its totient is φ = 25552177872.

The previous prime is 51212451223. The next prime is 51212451259. The reversal of 51212451242 is 24215421215.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1970609 + ... + 1996427.

It is an arithmetic number, because the mean of its divisors is an integer number (4811311710).

Almost surely, 2^51212451242 is an apocalyptic number.

51212451242 is a deficient number, since it is larger than the sum of its proper divisors (25768536118).

51212451242 is a wasteful number, since it uses less digits than its factorization.

51212451242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27877.

The product of its digits is 6400, while the sum is 29.

Adding to 51212451242 its reverse (24215421215), we get a palindrome (75427872457).

The spelling of 51212451242 in words is "fifty-one billion, two hundred twelve million, four hundred fifty-one thousand, two hundred forty-two".