51354450 has 216 divisors, whose sum is σ = 171179892. Its totient is φ = 10967040.

The previous prime is 51354439. The next prime is 51354451. The reversal of 51354450 is 5445315.

It can be written as a sum of positive squares in 6 ways, for example, as 28227969 + 23126481 = 5313^2 + 4809^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51354451) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 374782 + ... + 374918.

Almost surely, 2^51354450 is an apocalyptic number.

51354450 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 51354450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85589946).

51354450 is an abundant number, since it is smaller than the sum of its proper divisors (119825442).

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

51354450 is a wasteful number, since it uses less digits than its factorization.

51354450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 51354450 is about 7166.2019229157. The cubic root of 51354450 is about 371.7001138455.

Adding to 51354450 its reverse (5445315), we get a palindrome (56799765).

The spelling of 51354450 in words is "fifty-one million, three hundred fifty-four thousand, four hundred fifty".