50756781 has 12 divisors (see below), whose sum is σ = 71892032. Its totient is φ = 31846848.

The previous prime is 50756779. The next prime is 50756821. The reversal of 50756781 is 18765705.

It is not a de Polignac number, because 50756781 - 2¹ = 50756779 is a prime.

It is a super-2 number, since 2×50756781² = 5152501634963922, 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 (50756281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28405 + ... + 30138.

Almost surely, 2^50756781 is an apocalyptic number.

50756781 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

50756781 is a deficient number, since it is larger than the sum of its proper divisors (21135251).

50756781 is a wasteful number, since it uses less digits than its factorization.

50756781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58580 (or 58563 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 39.

The square root of 50756781 is about 7124.3793413883. The cubic root of 50756781 is about 370.2525205817.

The spelling of 50756781 in words is "fifty million, seven hundred fifty-six thousand, seven hundred eighty-one".