51535211121 has 16 divisors (see below), whose sum is σ = 76547819520. Its totient is φ = 34267096080.

The previous prime is 51535210957. The next prime is 51535211137. The reversal of 51535211121 is 12111253515.

It is a happy number.

51535211121 is a `hidden beast` number, since 5 + 1 + 535 + 2 + 1 + 1 + 121 = 666.

It is not a de Polignac number, because 51535211121 - 2¹⁵ = 51535178353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51535211141) 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, 2481450 + ... + 2502131.

It is an arithmetic number, because the mean of its divisors is an integer number (4784238720).

Almost surely, 2^51535211121 is an apocalyptic number.

It is an amenable number.

51535211121 is a deficient number, since it is larger than the sum of its proper divisors (25012608399).

51535211121 is a wasteful number, since it uses less digits than its factorization.

51535211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4983973 (or 4983967 counting only the distinct ones).

The product of its digits is 1500, while the sum is 27.

Adding to 51535211121 its reverse (12111253515), we get a palindrome (63646464636).

The spelling of 51535211121 in words is "fifty-one billion, five hundred thirty-five million, two hundred eleven thousand, one hundred twenty-one".