51243623413 has 8 divisors (see below), whose sum is σ = 56128918680. Its totient is φ = 46566213120.

The previous prime is 51243623411. The next prime is 51243623507. The reversal of 51243623413 is 31432634215.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17071512964 + 34172110449 = 130658^2 + 184857^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51243623413 - 2¹ = 51243623411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51243623411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51970728 + ... + 51971713.

It is an arithmetic number, because the mean of its divisors is an integer number (7016114835).

Almost surely, 2^51243623413 is an apocalyptic number.

It is an amenable number.

51243623413 is a deficient number, since it is larger than the sum of its proper divisors (4885295267).

51243623413 is a wasteful number, since it uses less digits than its factorization.

51243623413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103942487.

The product of its digits is 51840, while the sum is 34.

The spelling of 51243623413 in words is "fifty-one billion, two hundred forty-three million, six hundred twenty-three thousand, four hundred thirteen".