50510031021 has 6 divisors (see below), whose sum is σ = 72958933710. Its totient is φ = 33673354008.

The previous prime is 50510030983. The next prime is 50510031037. The reversal of 50510031021 is 12013001505.

50510031021 is a `hidden beast` number, since 50 + 510 + 0 + 3 + 102 + 1 = 666.

50510031021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33393542121 + 17116488900 = 182739^2 + 130830^2 .

It is not a de Polignac number, because 50510031021 - 2²¹ = 50507933869 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 50510030985 and 50510031003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50510031041) 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, 2806112826 + ... + 2806112843.

It is an arithmetic number, because the mean of its divisors is an integer number (12159822285).

Almost surely, 2^50510031021 is an apocalyptic number.

It is an amenable number.

50510031021 is a deficient number, since it is larger than the sum of its proper divisors (22448902689).

50510031021 is a wasteful number, since it uses less digits than its factorization.

50510031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5612225675 (or 5612225672 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

Adding to 50510031021 its reverse (12013001505), we get a palindrome (62523032526).

It can be divided in two parts, 505 and 10031021, that multiplied together give a palindrome (5065665605).

The spelling of 50510031021 in words is "fifty billion, five hundred ten million, thirty-one thousand, twenty-one".