50751520381 has 8 divisors (see below), whose sum is σ = 52326006840. Its totient is φ = 49187708928.

The previous prime is 50751520361. The next prime is 50751520403. The reversal of 50751520381 is 18302515705.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20755012356 + 29996508025 = 144066^2 + 173195^2 .

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 50751520381 - 2⁵ = 50751520349 is a prime.

It is a super-2 number, since 2×50751520381² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

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 50751520381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50751520361) 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, 2659096 + ... + 2678113.

It is an arithmetic number, because the mean of its divisors is an integer number (6540750855).

Almost surely, 2^50751520381 is an apocalyptic number.

It is an amenable number.

50751520381 is a deficient number, since it is larger than the sum of its proper divisors (1574486459).

50751520381 is a wasteful number, since it uses less digits than its factorization.

50751520381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5337503.

The product of its (nonzero) digits is 42000, while the sum is 37.

The spelling of 50751520381 in words is "fifty billion, seven hundred fifty-one million, five hundred twenty thousand, three hundred eighty-one".