51313400511 has 4 divisors (see below), whose sum is σ = 68417867352. Its totient is φ = 34208933672.

The previous prime is 51313400497. The next prime is 51313400561. The reversal of 51313400511 is 11500431315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51313400511 - 2⁹ = 51313399999 is a prime.

It is a super-2 number, since 2×51313400511² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51313400561) 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, 8552233416 + ... + 8552233421.

It is an arithmetic number, because the mean of its divisors is an integer number (17104466838).

Almost surely, 2^51313400511 is an apocalyptic number.

51313400511 is a deficient number, since it is larger than the sum of its proper divisors (17104466841).

51313400511 is a wasteful number, since it uses less digits than its factorization.

51313400511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17104466840.

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 51313400511 its reverse (11500431315), we get a palindrome (62813831826).

The spelling of 51313400511 in words is "fifty-one billion, three hundred thirteen million, four hundred thousand, five hundred eleven".