51105131232 has 48 divisors (see below), whose sum is σ = 137270770560. Its totient is φ = 16638878592.

The previous prime is 51105131219. The next prime is 51105131249. The reversal of 51105131232 is 23213150115.

51105131232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×51105131232² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 6185932 + ... + 6194187.

It is an arithmetic number, because the mean of its divisors is an integer number (2859807720).

Almost surely, 2^51105131232 is an apocalyptic number.

It is an amenable number.

51105131232 is an abundant number, since it is smaller than the sum of its proper divisors (86165639328).

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

51105131232 is a wasteful number, since it uses less digits than its factorization.

51105131232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12380175 (or 12380167 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 51105131232 its reverse (23213150115), we get a palindrome (74318281347).

The spelling of 51105131232 in words is "fifty-one billion, one hundred five million, one hundred thirty-one thousand, two hundred thirty-two".