50011811 has 4 divisors (see below), whose sum is σ = 50160552. Its totient is φ = 49863072.

The previous prime is 50011777. The next prime is 50011831. The reversal of 50011811 is 11811005.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50011811 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 50011811.

It is not an unprimeable number, because it can be changed into a prime (50011831) 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, 73865 + ... + 74538.

It is an arithmetic number, because the mean of its divisors is an integer number (12540138).

Almost surely, 2^50011811 is an apocalyptic number.

50011811 is a deficient number, since it is larger than the sum of its proper divisors (148741).

50011811 is a wasteful number, since it uses less digits than its factorization.

50011811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148740.

The product of its (nonzero) digits is 40, while the sum is 17.

The square root of 50011811 is about 7071.9029263700. The cubic root of 50011811 is about 368.4321556443.

Adding to 50011811 its reverse (11811005), we get a palindrome (61822816).

The spelling of 50011811 in words is "fifty million, eleven thousand, eight hundred eleven".