51217930446 has 16 divisors (see below), whose sum is σ = 108461499984. Its totient is φ = 16068370304.

The previous prime is 51217930427. The next prime is 51217930451. The reversal of 51217930446 is 64403971215.

It is a junction number, because it is equal to n+sod(n) for n = 51217930398 and 51217930407.

It is a congruent number.

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, 251068185 + ... + 251068388.

It is an arithmetic number, because the mean of its divisors is an integer number (6778843749).

Almost surely, 2^51217930446 is an apocalyptic number.

51217930446 is an abundant number, since it is smaller than the sum of its proper divisors (57243569538).

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

51217930446 is a wasteful number, since it uses less digits than its factorization.

51217930446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502136595.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 51217930446 in words is "fifty-one billion, two hundred seventeen million, nine hundred thirty thousand, four hundred forty-six".