51522250 has 64 divisors (see below), whose sum is σ = 105670656. Its totient is φ = 18696000.

The previous prime is 51522239. The next prime is 51522253. The reversal of 51522250 is 5222515.

It is not an unprimeable number, because it can be changed into a prime (51522253) 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 31 ways as a sum of consecutive naturals, for example, 269655 + ... + 269845.

It is an arithmetic number, because the mean of its divisors is an integer number (1651104).

Almost surely, 2^51522250 is an apocalyptic number.

51522250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51522250 is an abundant number, since it is smaller than the sum of its proper divisors (54148406).

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

51522250 is a wasteful number, since it uses less digits than its factorization.

51522250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 51522250 is about 7177.9001107566. The cubic root of 51522250 is about 372.1045154745.

Adding to 51522250 its reverse (5222515), we get a palindrome (56744765).

The spelling of 51522250 in words is "fifty-one million, five hundred twenty-two thousand, two hundred fifty".