51245506316503 has 4 divisors (see below), whose sum is σ = 53012592741240. Its totient is φ = 49478419891768.

The previous prime is 51245506316497. The next prime is 51245506316509. The reversal of 51245506316503 is 30561360554215.

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

It is an interprime number because it is at equal distance from previous prime (51245506316497) and next prime (51245506316509).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51245506316503 is a prime.

It is a super-2 number, since 2×51245506316503² (a number of 28 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 (51245506316509) 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, 883543212325 + ... + 883543212382.

It is an arithmetic number, because the mean of its divisors is an integer number (13253148185310).

Almost surely, 2^{51245506316503} is an apocalyptic number.

51245506316503 is a deficient number, since it is larger than the sum of its proper divisors (1767086424737).

51245506316503 is a wasteful number, since it uses less digits than its factorization.

51245506316503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767086424736.

The product of its (nonzero) digits is 1620000, while the sum is 46.

The spelling of 51245506316503 in words is "fifty-one trillion, two hundred forty-five billion, five hundred six million, three hundred sixteen thousand, five hundred three".