51336515121 has 4 divisors (see below), whose sum is σ = 68448686832. Its totient is φ = 34224343412.

The previous prime is 51336515107. The next prime is 51336515143. The reversal of 51336515121 is 12151563315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51336515121 - 2¹¹ = 51336513073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51336515101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8556085851 + ... + 8556085856.

It is an arithmetic number, because the mean of its divisors is an integer number (17112171708).

Almost surely, 2^51336515121 is an apocalyptic number.

It is an amenable number.

51336515121 is a deficient number, since it is larger than the sum of its proper divisors (17112171711).

51336515121 is a wasteful number, since it uses less digits than its factorization.

51336515121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17112171710.

The product of its digits is 13500, while the sum is 33.

The spelling of 51336515121 in words is "fifty-one billion, three hundred thirty-six million, five hundred fifteen thousand, one hundred twenty-one".