51078641 has 2 divisors, whose sum is σ = 51078642. Its totient is φ = 51078640.

The previous prime is 51078581. The next prime is 51078647. The reversal of 51078641 is 14687015.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40056241 + 11022400 = 6329^2 + 3320^2 .

It is a cyclic number.

It is not a de Polignac number, because 51078641 - 2¹⁰ = 51077617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51078598 and 51078607.

It is not a weakly prime, because it can be changed into another prime (51078647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25539320 + 25539321.

It is an arithmetic number, because the mean of its divisors is an integer number (25539321).

Almost surely, 2^51078641 is an apocalyptic number.

It is an amenable number.

51078641 is a deficient number, since it is larger than the sum of its proper divisors (1).

51078641 is an equidigital number, since it uses as much as digits as its factorization.

51078641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 51078641 is about 7146.9322789572. The cubic root of 51078641 is about 371.0334899041.

The spelling of 51078641 in words is "fifty-one million, seventy-eight thousand, six hundred forty-one".