51904512 has 120 divisors (see below), whose sum is σ = 163577700. Its totient is φ = 15728640.

The previous prime is 51904511. The next prime is 51904529. The reversal of 51904512 is 21540915.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51904511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4718587 + ... + 4718597.

Almost surely, 2^51904512 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 51904512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81788850).

51904512 is an abundant number, since it is smaller than the sum of its proper divisors (111673188).

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

51904512 is an frugal number, since it uses more digits than its factorization.

51904512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 16 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 51904512 is about 7204.4786070888. The cubic root of 51904512 is about 373.0225077281.

The spelling of 51904512 in words is "fifty-one million, nine hundred four thousand, five hundred twelve".