50911381 has 4 divisors (see below), whose sum is σ = 52153164. Its totient is φ = 49669600.

The previous prime is 50911369. The next prime is 50911403. The reversal of 50911381 is 18311905.

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 19439281 + 31472100 = 4409^2 + 5610^2 .

It is a cyclic number.

It is not a de Polignac number, because 50911381 - 2⁷ = 50911253 is a prime.

It is a super-2 number, since 2×50911381² = 5183937430654322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50911321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620830 + ... + 620911.

It is an arithmetic number, because the mean of its divisors is an integer number (13038291).

Almost surely, 2^50911381 is an apocalyptic number.

It is an amenable number.

50911381 is a deficient number, since it is larger than the sum of its proper divisors (1241783).

50911381 is a wasteful number, since it uses less digits than its factorization.

50911381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241782.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 50911381 is about 7135.2211598520. The cubic root of 50911381 is about 370.6280567492.

The spelling of 50911381 in words is "fifty million, nine hundred eleven thousand, three hundred eighty-one".