51970320 has 240 divisors, whose sum is σ = 191505600. Its totient is φ = 12579840.

The previous prime is 51970319. The next prime is 51970333. The reversal of 51970320 is 2307915.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 396655 + ... + 396785.

It is an arithmetic number, because the mean of its divisors is an integer number (797940).

Almost surely, 2^51970320 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 51970320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95752800).

51970320 is an abundant number, since it is smaller than the sum of its proper divisors (139535280).

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

51970320 is a wasteful number, since it uses less digits than its factorization.

51970320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 51970320 is about 7209.0443194643. The cubic root of 51970320 is about 373.1800887493.

The spelling of 51970320 in words is "fifty-one million, nine hundred seventy thousand, three hundred twenty".