51314451413 has 4 divisors (see below), whose sum is σ = 51442418028. Its totient is φ = 51186484800.

The previous prime is 51314451407. The next prime is 51314451421. The reversal of 51314451413 is 31415441315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42702982609 + 8611468804 = 206647^2 + 92798^2 .

It is a cyclic number.

It is not a de Polignac number, because 51314451413 - 2²² = 51310257109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51314451413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51314451403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63982706 + ... + 63983507.

It is an arithmetic number, because the mean of its divisors is an integer number (12860604507).

Almost surely, 2^51314451413 is an apocalyptic number.

It is an amenable number.

51314451413 is a deficient number, since it is larger than the sum of its proper divisors (127966615).

51314451413 is a wasteful number, since it uses less digits than its factorization.

51314451413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127966614.

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

Adding to 51314451413 its reverse (31415441315), we get a palindrome (82729892728).

It can be divided in two parts, 5131 and 4451413, that added together give a palindrome (4456544).

The spelling of 51314451413 in words is "fifty-one billion, three hundred fourteen million, four hundred fifty-one thousand, four hundred thirteen".