51236205652 has 12 divisors (see below), whose sum is σ = 89666064180. Its totient is φ = 25617330176.

The previous prime is 51236205593. The next prime is 51236205661. The reversal of 51236205652 is 25650263215.

It can be written as a sum of positive squares in 2 ways, for example, as 27874305936 + 23361899716 = 166956^2 + 152846^2 .

It is a super-2 number, since 2×51236205652² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28333 + ... + 321364.

It is an arithmetic number, because the mean of its divisors is an integer number (7472172015).

Almost surely, 2^51236205652 is an apocalyptic number.

It is an amenable number.

51236205652 is a deficient number, since it is larger than the sum of its proper divisors (38429858528).

51236205652 is a wasteful number, since it uses less digits than its factorization.

51236205652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386330 (or 386328 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 51236205652 its reverse (25650263215), we get a palindrome (76886468867).

The spelling of 51236205652 in words is "fifty-one billion, two hundred thirty-six million, two hundred five thousand, six hundred fifty-two".