50511681 has 28 divisors (see below), whose sum is σ = 82630800. Its totient is φ = 30608280.

The previous prime is 50511677. The next prime is 50511689. The reversal of 50511681 is 18611505.

It is not a de Polignac number, because 50511681 - 2² = 50511677 is a prime.

It is a super-2 number, since 2×50511681² = 5102859834891522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (50511689) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4870 + ... + 11168.

It is an arithmetic number, because the mean of its divisors is an integer number (2951100).

Almost surely, 2^50511681 is an apocalyptic number.

It is an amenable number.

50511681 is a deficient number, since it is larger than the sum of its proper divisors (32119119).

50511681 is an equidigital number, since it uses as much as digits as its factorization.

50511681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6328 (or 6313 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The square root of 50511681 is about 7107.1570265473. The cubic root of 50511681 is about 369.6555864912.

The spelling of 50511681 in words is "fifty million, five hundred eleven thousand, six hundred eighty-one".