50781811 has 2 divisors, whose sum is σ = 50781812. Its totient is φ = 50781810.

The previous prime is 50781799. The next prime is 50781817. The reversal of 50781811 is 11818705.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 50781811 - 2⁹ = 50781299 is a prime.

It is not a weakly prime, because it can be changed into another prime (50781817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25390905 + 25390906.

It is an arithmetic number, because the mean of its divisors is an integer number (25390906).

Almost surely, 2^50781811 is an apocalyptic number.

50781811 is a deficient number, since it is larger than the sum of its proper divisors (1).

50781811 is an equidigital number, since it uses as much as digits as its factorization.

50781811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 31.

The square root of 50781811 is about 7126.1357691248. The cubic root of 50781811 is about 370.3133722056.

It can be divided in two parts, 5078 and 1811, that added together give a square (6889 = 83²).

The spelling of 50781811 in words is "fifty million, seven hundred eighty-one thousand, eight hundred eleven".