51397202041 has 8 divisors (see below), whose sum is σ = 51610676040. Its totient is φ = 51183833088.

The previous prime is 51397202009. The next prime is 51397202047. The reversal of 51397202041 is 14020279315.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22843299600 + 28553902441 = 151140^2 + 168979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51397202041 - 2⁵ = 51397202009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51397201988 and 51397202006.

It is not an unprimeable number, because it can be changed into a prime (51397202047) 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 7 ways as a sum of consecutive naturals, for example, 1044295 + ... + 1092403.

It is an arithmetic number, because the mean of its divisors is an integer number (6451334505).

Almost surely, 2^51397202041 is an apocalyptic number.

It is an amenable number.

51397202041 is a deficient number, since it is larger than the sum of its proper divisors (213473999).

51397202041 is a wasteful number, since it uses less digits than its factorization.

51397202041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52523.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 51397202041 in words is "fifty-one billion, three hundred ninety-seven million, two hundred two thousand, forty-one".