51947469733 has 4 divisors (see below), whose sum is σ = 52176313440. Its totient is φ = 51718626028.

The previous prime is 51947469727. The next prime is 51947469757. The reversal of 51947469733 is 33796474915.

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 a de Polignac number, because none of the positive numbers 2^k-51947469733 is a prime.

It is a super-2 number, since 2×51947469733² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51947469703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114421513 + ... + 114421966.

It is an arithmetic number, because the mean of its divisors is an integer number (13044078360).

Almost surely, 2^51947469733 is an apocalyptic number.

It is an amenable number.

51947469733 is a deficient number, since it is larger than the sum of its proper divisors (228843707).

51947469733 is a wasteful number, since it uses less digits than its factorization.

51947469733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228843706.

The product of its digits is 17146080, while the sum is 58.

The spelling of 51947469733 in words is "fifty-one billion, nine hundred forty-seven million, four hundred sixty-nine thousand, seven hundred thirty-three".