50287781 has 2 divisors, whose sum is σ = 50287782. Its totient is φ = 50287780.

The previous prime is 50287763. The next prime is 50287789. The reversal of 50287781 is 18778205.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48302500 + 1985281 = 6950^2 + 1409^2 .

It is a cyclic number.

It is not a de Polignac number, because 50287781 - 2¹⁸ = 50025637 is a prime.

It is a super-2 number, since 2×50287781² = 5057721835807922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50287789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25143890 + 25143891.

It is an arithmetic number, because the mean of its divisors is an integer number (25143891).

Almost surely, 2^50287781 is an apocalyptic number.

It is an amenable number.

50287781 is a deficient number, since it is larger than the sum of its proper divisors (1).

50287781 is an equidigital number, since it uses as much as digits as its factorization.

50287781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 50287781 is about 7091.3878049364. The cubic root of 50287781 is about 369.1085943458.

The spelling of 50287781 in words is "fifty million, two hundred eighty-seven thousand, seven hundred eighty-one".