51011543232 has 224 divisors, whose sum is σ = 168523676160. Its totient is φ = 15013278720.

The previous prime is 51011543173. The next prime is 51011543251. The reversal of 51011543232 is 23234511015.

51011543232 is a `hidden beast` number, since 510 + 115 + 4 + 3 + 2 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 51011543196 and 51011543205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 467307 + ... + 566037.

It is an arithmetic number, because the mean of its divisors is an integer number (752337840).

Almost surely, 2^51011543232 is an apocalyptic number.

51011543232 is a gapful number since it is divisible by the number (52) 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 51011543232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84261838080).

51011543232 is an abundant number, since it is smaller than the sum of its proper divisors (117512132928).

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

51011543232 is a wasteful number, since it uses less digits than its factorization.

51011543232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98788 (or 98772 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 51011543232 in words is "fifty-one billion, eleven million, five hundred forty-three thousand, two hundred thirty-two".