51435231511 has 2 divisors, whose sum is σ = 51435231512. Its totient is φ = 51435231510.

The previous prime is 51435231487. The next prime is 51435231539. The reversal of 51435231511 is 11513253415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51435231511 - 2⁷ = 51435231383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51435231571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25717615755 + 25717615756.

It is an arithmetic number, because the mean of its divisors is an integer number (25717615756).

Almost surely, 2^51435231511 is an apocalyptic number.

51435231511 is a deficient number, since it is larger than the sum of its proper divisors (1).

51435231511 is an equidigital number, since it uses as much as digits as its factorization.

51435231511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 31.

Adding to 51435231511 its reverse (11513253415), we get a palindrome (62948484926).

The spelling of 51435231511 in words is "fifty-one billion, four hundred thirty-five million, two hundred thirty-one thousand, five hundred eleven".