51910320 has 240 divisors, whose sum is σ = 204486912. Its totient is φ = 10583040.

The previous prime is 51910283. The next prime is 51910343. The reversal of 51910320 is 2301915.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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, 979414 + ... + 979466.

Almost surely, 2^51910320 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 51910320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102243456).

51910320 is an abundant number, since it is smaller than the sum of its proper divisors (152576592).

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

51910320 is a wasteful number, since it uses less digits than its factorization.

51910320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 51910320 is about 7204.8816784178. The cubic root of 51910320 is about 373.0364206735.

The spelling of 51910320 in words is "fifty-one million, nine hundred ten thousand, three hundred twenty".