51310661322 has 16 divisors (see below), whose sum is σ = 104152984992. Its totient is φ = 16848276720.

The previous prime is 51310661309. The next prime is 51310661329. The reversal of 51310661322 is 22316601315.

It is a self number, because there is not a number n which added to its sum of digits gives 51310661322.

It is not an unprimeable number, because it can be changed into a prime (51310661329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63818829 + ... + 63819632.

It is an arithmetic number, because the mean of its divisors is an integer number (6509561562).

Almost surely, 2^51310661322 is an apocalyptic number.

51310661322 is an abundant number, since it is smaller than the sum of its proper divisors (52842323670).

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

51310661322 is a wasteful number, since it uses less digits than its factorization.

51310661322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127638533.

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 51310661322 in words is "fifty-one billion, three hundred ten million, six hundred sixty-one thousand, three hundred twenty-two".