51431440311 has 12 divisors (see below), whose sum is σ = 74293821888. Its totient is φ = 34285797504.

The previous prime is 51431440267. The next prime is 51431440321. The reversal of 51431440311 is 11304413415.

51431440311 is a `hidden beast` number, since 514 + 3 + 144 + 0 + 3 + 1 + 1 = 666.

It is not a de Polignac number, because 51431440311 - 2¹¹ = 51431438263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51431440321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38151 + ... + 322983.

It is an arithmetic number, because the mean of its divisors is an integer number (6191151824).

Almost surely, 2^51431440311 is an apocalyptic number.

51431440311 is a deficient number, since it is larger than the sum of its proper divisors (22862381577).

51431440311 is a wasteful number, since it uses less digits than its factorization.

51431440311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304902 (or 304899 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 51431440311 its reverse (11304413415), we get a palindrome (62735853726).

The spelling of 51431440311 in words is "fifty-one billion, four hundred thirty-one million, four hundred forty thousand, three hundred eleven".