51815201429 has 2 divisors, whose sum is σ = 51815201430. Its totient is φ = 51815201428.

The previous prime is 51815201401. The next prime is 51815201437. The reversal of 51815201429 is 92410251815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33005078929 + 18810122500 = 181673^2 + 137150^2 .

It is a cyclic number.

It is not a de Polignac number, because 51815201429 - 2¹² = 51815197333 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51815201392 and 51815201401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51815201129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25907600714 + 25907600715.

It is an arithmetic number, because the mean of its divisors is an integer number (25907600715).

Almost surely, 2^51815201429 is an apocalyptic number.

It is an amenable number.

51815201429 is a deficient number, since it is larger than the sum of its proper divisors (1).

51815201429 is an equidigital number, since it uses as much as digits as its factorization.

51815201429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 38.

The spelling of 51815201429 in words is "fifty-one billion, eight hundred fifteen million, two hundred one thousand, four hundred twenty-nine".