51325650 has 240 divisors, whose sum is σ = 162043200. Its totient is φ = 11975040.

The previous prime is 51325649. The next prime is 51325661. The reversal of 51325650 is 5652315.

51325650 is a `hidden beast` number, since 5 + 1 + 3 + 2 + 5 + 650 = 666.

51325650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 119 ways as a sum of consecutive naturals, for example, 1769836 + ... + 1769864.

It is an arithmetic number, because the mean of its divisors is an integer number (675180).

Almost surely, 2^51325650 is an apocalyptic number.

51325650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51325650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81021600).

51325650 is an abundant number, since it is smaller than the sum of its proper divisors (110717550).

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

51325650 is a wasteful number, since it uses less digits than its factorization.

51325650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 51325650 is about 7164.1922084768. The cubic root of 51325650 is about 371.6306166870.

Adding to 51325650 its reverse (5652315), we get a palindrome (56977965).

The spelling of 51325650 in words is "fifty-one million, three hundred twenty-five thousand, six hundred fifty".