51904580 has 144 divisors (see below), whose sum is σ = 143377920. Its totient is φ = 15365376.

The previous prime is 51904547. The next prime is 51904609. The reversal of 51904580 is 8540915.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 656981 + ... + 657059.

It is an arithmetic number, because the mean of its divisors is an integer number (995680).

Almost surely, 2^51904580 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 51904580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71688960).

51904580 is an abundant number, since it is smaller than the sum of its proper divisors (91473340).

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

51904580 is a wasteful number, since it uses less digits than its factorization.

51904580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 51904580 is about 7204.4833263739. The cubic root of 51904580 is about 373.0226706267.

The spelling of 51904580 in words is "fifty-one million, nine hundred four thousand, five hundred eighty".