51435231487 has 2 divisors, whose sum is σ = 51435231488. Its totient is φ = 51435231486.

The previous prime is 51435231443. The next prime is 51435231511. The reversal of 51435231487 is 78413253415.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51435231487 - 2³⁵ = 17075493119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51435201487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25717615743 + 25717615744.

It is an arithmetic number, because the mean of its divisors is an integer number (25717615744).

Almost surely, 2^51435231487 is an apocalyptic number.

51435231487 is a deficient number, since it is larger than the sum of its proper divisors (1).

51435231487 is an equidigital number, since it uses as much as digits as its factorization.

51435231487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 43.

The spelling of 51435231487 in words is "fifty-one billion, four hundred thirty-five million, two hundred thirty-one thousand, four hundred eighty-seven".