51505350 has 96 divisors (see below), whose sum is σ = 140136864. Its totient is φ = 12441600.

The previous prime is 51505343. The next prime is 51505367. The reversal of 51505350 is 5350515.

It is a self number, because there is not a number n which added to its sum of digits gives 51505350.

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, 118734 + ... + 119166.

It is an arithmetic number, because the mean of its divisors is an integer number (1459759).

Almost surely, 2^51505350 is an apocalyptic number.

51505350 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 51505350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70068432).

51505350 is an abundant number, since it is smaller than the sum of its proper divisors (88631514).

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

51505350 is a wasteful number, since it uses less digits than its factorization.

51505350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 1875, while the sum is 24.

The square root of 51505350 is about 7176.7227896861. The cubic root of 51505350 is about 372.0638259082.

Adding to 51505350 its reverse (5350515), we get a palindrome (56855865).

The spelling of 51505350 in words is "fifty-one million, five hundred five thousand, three hundred fifty".