51186001521 has 16 divisors (see below), whose sum is σ = 71221622400. Its totient is φ = 32637454080.

The previous prime is 51186001469. The next prime is 51186001597. The reversal of 51186001521 is 12510068115.

It is not a de Polignac number, because 51186001521 - 2¹⁵ = 51185968753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51186000521) 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, 971311 + ... + 1022651.

It is an arithmetic number, because the mean of its divisors is an integer number (4451351400).

Almost surely, 2^51186001521 is an apocalyptic number.

It is an amenable number.

51186001521 is a deficient number, since it is larger than the sum of its proper divisors (20035620879).

51186001521 is a wasteful number, since it uses less digits than its factorization.

51186001521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65816.

The product of its (nonzero) digits is 2400, while the sum is 30.

Adding to 51186001521 its reverse (12510068115), we get a palindrome (63696069636).

The spelling of 51186001521 in words is "fifty-one billion, one hundred eighty-six million, one thousand, five hundred twenty-one".