51232161000 has 256 divisors, whose sum is σ = 164716830720. Its totient is φ = 13248000000.

The previous prime is 51232160999. The next prime is 51232161041. The reversal of 51232161000 is 16123215.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44510425 + ... + 44511575.

It is an arithmetic number, because the mean of its divisors is an integer number (643425120).

Almost surely, 2^51232161000 is an apocalyptic number.

51232161000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51232161000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82358415360).

51232161000 is an abundant number, since it is smaller than the sum of its proper divisors (113484669720).

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

51232161000 is a wasteful number, since it uses less digits than its factorization.

51232161000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613 (or 1599 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 51232161000 its reverse (16123215), we get a palindrome (51248284215).

The spelling of 51232161000 in words is "fifty-one billion, two hundred thirty-two million, one hundred sixty-one thousand".