50705021 has 8 divisors (see below), whose sum is σ = 52921080. Its totient is φ = 48520192.

The previous prime is 50705009. The next prime is 50705027. The reversal of 50705021 is 12050705.

It can be written as a sum of positive squares in 4 ways, for example, as 81796 + 50623225 = 286^2 + 7115^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50705021 - 2¹⁰ = 50703997 is a prime.

It is a super-2 number, since 2×50705021² = 5141998309220882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50704984 and 50705002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50705027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4460 + ... + 11013.

It is an arithmetic number, because the mean of its divisors is an integer number (6615135).

Almost surely, 2^50705021 is an apocalyptic number.

It is an amenable number.

50705021 is a deficient number, since it is larger than the sum of its proper divisors (2216059).

50705021 is a wasteful number, since it uses less digits than its factorization.

50705021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15615.

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 50705021 is about 7120.7458176795. The cubic root of 50705021 is about 370.1266208948.

Adding to 50705021 its reverse (12050705), we get a palindrome (62755726).

The spelling of 50705021 in words is "fifty million, seven hundred five thousand, twenty-one".