51031203642 has 48 divisors (see below), whose sum is σ = 111903304032. Its totient is φ = 16805637600.

The previous prime is 51031203631. The next prime is 51031203683. The reversal of 51031203642 is 24630213015.

51031203642 is a `hidden beast` number, since 5 + 1 + 0 + 3 + 12 + 0 + 3 + 642 = 666.

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, 818953 + ... + 879059.

It is an arithmetic number, because the mean of its divisors is an integer number (2331318834).

Almost surely, 2^51031203642 is an apocalyptic number.

51031203642 is an abundant number, since it is smaller than the sum of its proper divisors (60872100390).

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

51031203642 is a wasteful number, since it uses less digits than its factorization.

51031203642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60683 (or 60680 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 51031203642 its reverse (24630213015), we get a palindrome (75661416657).

The spelling of 51031203642 in words is "fifty-one billion, thirty-one million, two hundred three thousand, six hundred forty-two".