51222650 has 24 divisors (see below), whose sum is σ = 95465244. Its totient is φ = 20448000.

The previous prime is 51222641. The next prime is 51222659. The reversal of 51222650 is 5622215.

51222650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 7157²+1.

It is an interprime number because it is at equal distance from previous prime (51222641) and next prime (51222659).

It can be written as a sum of positive squares in 6 ways, for example, as 1 + 51222649 = 1^2 + 7157^2 .

It is not an unprimeable number, because it can be changed into a prime (51222659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42050 + ... + 43250.

Almost surely, 2^51222650 is an apocalyptic number.

51222650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51222650 is a deficient number, since it is larger than the sum of its proper divisors (44242594).

51222650 is a wasteful number, since it uses less digits than its factorization.

51222650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066 (or 2061 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 51222650 is about 7157.0000698617. Note that the first 4 decimals coincide. The cubic root of 51222650 is about 371.3818548599.

Adding to 51222650 its reverse (5622215), we get a palindrome (56844865).

The spelling of 51222650 in words is "fifty-one million, two hundred twenty-two thousand, six hundred fifty".