51135752206 has 32 divisors (see below), whose sum is σ = 95644230912. Its totient is φ = 19920159360.

The previous prime is 51135752153. The next prime is 51135752233. The reversal of 51135752206 is 60225753115.

It is a super-2 number, since 2×51135752206² (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 15 ways as a sum of consecutive naturals, for example, 1284310 + ... + 1323526.

It is an arithmetic number, because the mean of its divisors is an integer number (2988882216).

Almost surely, 2^51135752206 is an apocalyptic number.

51135752206 is a deficient number, since it is larger than the sum of its proper divisors (44508478706).

51135752206 is a wasteful number, since it uses less digits than its factorization.

51135752206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47704.

The product of its (nonzero) digits is 63000, while the sum is 37.

Subtracting 51135752206 from its reverse (60225753115), we obtain a palindrome (9090000909).

The spelling of 51135752206 in words is "fifty-one billion, one hundred thirty-five million, seven hundred fifty-two thousand, two hundred six".