51311134445 has 4 divisors (see below), whose sum is σ = 61573361340. Its totient is φ = 41048907552.

The previous prime is 51311134439. The next prime is 51311134451. The reversal of 51311134445 is 54443111315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54443111315 = 5 ⋅10888622263.

It is an interprime number because it is at equal distance from previous prime (51311134439) and next prime (51311134451).

It can be written as a sum of positive squares in 2 ways, for example, as 35502850084 + 15808284361 = 188422^2 + 125731^2 .

It is a cyclic number.

It is not a de Polignac number, because 51311134445 - 2¹² = 51311130349 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5131113440 + ... + 5131113449.

It is an arithmetic number, because the mean of its divisors is an integer number (15393340335).

Almost surely, 2^51311134445 is an apocalyptic number.

It is an amenable number.

51311134445 is a deficient number, since it is larger than the sum of its proper divisors (10262226895).

51311134445 is a wasteful number, since it uses less digits than its factorization.

51311134445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10262226894.

The product of its digits is 14400, while the sum is 32.

The spelling of 51311134445 in words is "fifty-one billion, three hundred eleven million, one hundred thirty-four thousand, four hundred forty-five".