51222052 has 18 divisors (see below), whose sum is σ = 104273862. Its totient is φ = 21952224.

The previous prime is 51222047. The next prime is 51222107. The reversal of 51222052 is 25022215.

It can be written as a sum of positive squares in only one way, i.e., 33108516 + 18113536 = 5754^2 + 4256^2 .

It is a super-2 number, since 2×51222052² = 5247397222181408, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 130473 + ... + 130864.

Almost surely, 2^51222052 is an apocalyptic number.

It is an amenable number.

51222052 is an abundant number, since it is smaller than the sum of its proper divisors (53051810).

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

51222052 is a wasteful number, since it uses less digits than its factorization.

51222052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261355 (or 261346 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 51222052 is about 7156.9582924592. The cubic root of 51222052 is about 371.3804096189.

Adding to 51222052 its reverse (25022215), we get a palindrome (76244267).

The spelling of 51222052 in words is "fifty-one million, two hundred twenty-two thousand, fifty-two".