50208781 has 6 divisors (see below), whose sum is σ = 58406190. Its totient is φ = 43036056.

The previous prime is 50208749. The next prime is 50208791. The reversal of 50208781 is 18780205.

It can be written as a sum of positive squares in only one way, i.e., 45346756 + 4862025 = 6734^2 + 2205^2 .

It is not a de Polignac number, because 50208781 - 2⁵ = 50208749 is a prime.

It is a super-2 number, since 2×50208781² = 5041843379011922, 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 (50208721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 512286 + ... + 512383.

It is an arithmetic number, because the mean of its divisors is an integer number (9734365).

Almost surely, 2^50208781 is an apocalyptic number.

It is an amenable number.

50208781 is a deficient number, since it is larger than the sum of its proper divisors (8197409).

50208781 is a wasteful number, since it uses less digits than its factorization.

50208781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024683 (or 1024676 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 50208781 is about 7085.8154788281. The cubic root of 50208781 is about 368.9152083237.

Adding to 50208781 its reverse (18780205), we get a palindrome (68988986).

The spelling of 50208781 in words is "fifty million, two hundred eight thousand, seven hundred eighty-one".