51394500 has 192 divisors, whose sum is σ = 171924480. Its totient is φ = 13413600.

The previous prime is 51394493. The next prime is 51394501. The reversal of 51394500 is 549315.

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

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (51394501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1093477 + ... + 1093523.

It is an arithmetic number, because the mean of its divisors is an integer number (895440).

Almost surely, 2^51394500 is an apocalyptic number.

51394500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51394500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85962240).

51394500 is an abundant number, since it is smaller than the sum of its proper divisors (120529980).

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

51394500 is an equidigital number, since it uses as much as digits as its factorization.

51394500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 51394500 is about 7168.9957455699. The cubic root of 51394500 is about 371.7967151549.

The spelling of 51394500 in words is "fifty-one million, three hundred ninety-four thousand, five hundred".