51975630 has 192 divisors, whose sum is σ = 171445248. Its totient is φ = 10644480.

The previous prime is 51975629. The next prime is 51975631. The reversal of 51975630 is 3657915.

It is a happy number.

51975630 is a `hidden beast` number, since 5 + 1 + 97 + 563 + 0 = 666.

51975630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51975629) and next prime (51975631).

It is a super-2 number, since 2×51975630² = 5402932227793800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51975631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 246225 + ... + 246435.

It is an arithmetic number, because the mean of its divisors is an integer number (892944).

Almost surely, 2^51975630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51975630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85722624).

51975630 is an abundant number, since it is smaller than the sum of its proper divisors (119469618).

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

51975630 is a wasteful number, since it uses less digits than its factorization.

51975630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 51975630 is about 7209.4125974312. The cubic root of 51975630 is about 373.1927980469.

The spelling of 51975630 in words is "fifty-one million, nine hundred seventy-five thousand, six hundred thirty".