51261707237 has 16 divisors (see below), whose sum is σ = 55370070000. Its totient is φ = 47177109504.

The previous prime is 51261707179. The next prime is 51261707249. The reversal of 51261707237 is 73270716215.

It can be written as a sum of positive squares in 8 ways, for example, as 11133204196 + 40128503041 = 105514^2 + 200321^2 .

It is a cyclic number.

It is not a de Polignac number, because 51261707237 - 2¹⁴ = 51261690853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51261707194 and 51261707203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51261707137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10439939 + ... + 10444847.

It is an arithmetic number, because the mean of its divisors is an integer number (3460629375).

Almost surely, 2^51261707237 is an apocalyptic number.

It is an amenable number.

51261707237 is a deficient number, since it is larger than the sum of its proper divisors (4108362763).

51261707237 is a wasteful number, since it uses less digits than its factorization.

51261707237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7160.

The product of its (nonzero) digits is 123480, while the sum is 41.

The spelling of 51261707237 in words is "fifty-one billion, two hundred sixty-one million, seven hundred seven thousand, two hundred thirty-seven".