51138167322 has 64 divisors (see below), whose sum is σ = 112597879680. Its totient is φ = 15482424320.

The previous prime is 51138167309. The next prime is 51138167383. The reversal of 51138167322 is 22376183115.

It is a happy number.

It is a super-2 number, since 2×51138167322² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11920954 + ... + 11925242.

It is an arithmetic number, because the mean of its divisors is an integer number (1759341870).

Almost surely, 2^51138167322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51138167322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56298939840).

51138167322 is an abundant number, since it is smaller than the sum of its proper divisors (61459712358).

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

51138167322 is a wasteful number, since it uses less digits than its factorization.

51138167322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5820 (or 5798 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The spelling of 51138167322 in words is "fifty-one billion, one hundred thirty-eight million, one hundred sixty-seven thousand, three hundred twenty-two".