51522450 has 48 divisors (see below), whose sum is σ = 146032320. Its totient is φ = 11776320.

The previous prime is 51522439. The next prime is 51522469. The reversal of 51522450 is 5422515.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51522450.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 23485 + ... + 25584.

It is an arithmetic number, because the mean of its divisors is an integer number (3042340).

Almost surely, 2^51522450 is an apocalyptic number.

51522450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51522450 is an abundant number, since it is smaller than the sum of its proper divisors (94509870).

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

51522450 is a wasteful number, since it uses less digits than its factorization.

51522450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49091 (or 49086 counting only the distinct ones).

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

The square root of 51522450 is about 7177.9140423942. The cubic root of 51522450 is about 372.1049969545.

Adding to 51522450 its reverse (5422515), we get a palindrome (56944965).

The spelling of 51522450 in words is "fifty-one million, five hundred twenty-two thousand, four hundred fifty".