51450450 has 48 divisors (see below), whose sum is σ = 129711936. Its totient is φ = 13492800.

The previous prime is 51450407. The next prime is 51450467. The reversal of 51450450 is 5405415.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51450450.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6339 + ... + 11961.

It is an arithmetic number, because the mean of its divisors is an integer number (2702332).

Almost surely, 2^51450450 is an apocalyptic number.

51450450 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 51450450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64855968).

51450450 is an abundant number, since it is smaller than the sum of its proper divisors (78261486).

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

51450450 is a wasteful number, since it uses less digits than its factorization.

51450450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5699 (or 5694 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 51450450 is about 7172.8969043198. The cubic root of 51450450 is about 371.9315835562.

Adding to 51450450 its reverse (5405415), we get a palindrome (56855865).

The spelling of 51450450 in words is "fifty-one million, four hundred fifty thousand, four hundred fifty".