51131211443 has 6 divisors (see below), whose sum is σ = 55366933284. Its totient is φ = 47198041176.

The previous prime is 51131211433. The next prime is 51131211493. The reversal of 51131211443 is 34411213115.

It is not a de Polignac number, because 51131211443 - 2¹⁶ = 51131145907 is a prime.

It is a super-2 number, since 2×51131211443² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51131211433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151275605 + ... + 151275942.

It is an arithmetic number, because the mean of its divisors is an integer number (9227822214).

Almost surely, 2^51131211443 is an apocalyptic number.

51131211443 is a deficient number, since it is larger than the sum of its proper divisors (4235721841).

51131211443 is a wasteful number, since it uses less digits than its factorization.

51131211443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302551573 (or 302551560 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

Adding to 51131211443 its reverse (34411213115), we get a palindrome (85542424558).

The spelling of 51131211443 in words is "fifty-one billion, one hundred thirty-one million, two hundred eleven thousand, four hundred forty-three".