51463325813 has 4 divisors (see below), whose sum is σ = 52558290240. Its totient is φ = 50368361388.

The previous prime is 51463325807. The next prime is 51463325857. The reversal of 51463325813 is 31852336415.

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 51463325813 - 2¹⁸ = 51463063669 is a prime.

It is a super-2 number, since 2×51463325813² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51463325413) 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, 547482143 + ... + 547482236.

It is an arithmetic number, because the mean of its divisors is an integer number (13139572560).

Almost surely, 2^51463325813 is an apocalyptic number.

It is an amenable number.

51463325813 is a deficient number, since it is larger than the sum of its proper divisors (1094964427).

51463325813 is a wasteful number, since it uses less digits than its factorization.

51463325813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094964426.

The product of its digits is 259200, while the sum is 41.

The spelling of 51463325813 in words is "fifty-one billion, four hundred sixty-three million, three hundred twenty-five thousand, eight hundred thirteen".