50001213613 has 8 divisors (see below), whose sum is σ = 54402590648. Its totient is φ = 45679140864.

The previous prime is 50001213601. The next prime is 50001213643. The reversal of 50001213613 is 31631210005.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2231428644 + 47769784969 = 47238^2 + 218563^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50001213613 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 (50001213643) 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, 19824756 + ... + 19827277.

It is an arithmetic number, because the mean of its divisors is an integer number (6800323831).

Almost surely, 2^50001213613 is an apocalyptic number.

It is an amenable number.

50001213613 is a deficient number, since it is larger than the sum of its proper divisors (4401377035).

50001213613 is a wasteful number, since it uses less digits than its factorization.

50001213613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39652143.

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 50001213613 its reverse (31631210005), we get a palindrome (81632423618).

The spelling of 50001213613 in words is "fifty billion, one million, two hundred thirteen thousand, six hundred thirteen".