51435031247 has 2 divisors, whose sum is σ = 51435031248. Its totient is φ = 51435031246.

The previous prime is 51435031229. The next prime is 51435031253. The reversal of 51435031247 is 74213053415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51435031247 - 2¹⁰ = 51435030223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51435031217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25717515623 + 25717515624.

It is an arithmetic number, because the mean of its divisors is an integer number (25717515624).

Almost surely, 2^51435031247 is an apocalyptic number.

51435031247 is a deficient number, since it is larger than the sum of its proper divisors (1).

51435031247 is an equidigital number, since it uses as much as digits as its factorization.

51435031247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 51435031247 in words is "fifty-one billion, four hundred thirty-five million, thirty-one thousand, two hundred forty-seven".