51782014397 has 2 divisors, whose sum is σ = 51782014398. Its totient is φ = 51782014396.

The previous prime is 51782014343. The next prime is 51782014409. The reversal of 51782014397 is 79341028715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31036221241 + 20745793156 = 176171^2 + 144034^2 .

It is a cyclic number.

It is not a de Polignac number, because 51782014397 - 2¹⁰ = 51782013373 is a prime.

It is a super-2 number, since 2×51782014397² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51782014307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25891007198 + 25891007199.

It is an arithmetic number, because the mean of its divisors is an integer number (25891007199).

Almost surely, 2^51782014397 is an apocalyptic number.

It is an amenable number.

51782014397 is a deficient number, since it is larger than the sum of its proper divisors (1).

51782014397 is an equidigital number, since it uses as much as digits as its factorization.

51782014397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 51782014397 in words is "fifty-one billion, seven hundred eighty-two million, fourteen thousand, three hundred ninety-seven".