51486432 has 48 divisors (see below), whose sum is σ = 138039552. Its totient is φ = 16795520.

The previous prime is 51486427. The next prime is 51486439. The reversal of 51486432 is 23468415.

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

It is a junction number, because it is equal to n+sod(n) for n = 51486393 and 51486402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51486439) 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, 1194 + ... + 10217.

It is an arithmetic number, because the mean of its divisors is an integer number (2875824).

Almost surely, 2^51486432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51486432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69019776).

51486432 is an abundant number, since it is smaller than the sum of its proper divisors (86553120).

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

51486432 is a wasteful number, since it uses less digits than its factorization.

51486432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11471 (or 11463 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 51486432 is about 7175.4046575786. The cubic root of 51486432 is about 372.0182671108.

The spelling of 51486432 in words is "fifty-one million, four hundred eighty-six thousand, four hundred thirty-two".