50420521 has 8 divisors (see below), whose sum is σ = 53778600. Its totient is φ = 47106048.

The previous prime is 50420483. The next prime is 50420551. The reversal of 50420521 is 12502405.

It can be written as a sum of positive squares in 4 ways, for example, as 12425625 + 37994896 = 3525^2 + 6164^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-50420521 is a prime.

It is a super-2 number, since 2×50420521² = 5084457875822882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50420551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8496 + ... + 13153.

It is an arithmetic number, because the mean of its divisors is an integer number (6722325).

Almost surely, 2^50420521 is an apocalyptic number.

It is an amenable number.

50420521 is a deficient number, since it is larger than the sum of its proper divisors (3358079).

50420521 is a wasteful number, since it uses less digits than its factorization.

50420521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21803.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 50420521 is about 7100.7408768381. The cubic root of 50420521 is about 369.4330762732.

Adding to 50420521 its reverse (12502405), we get a palindrome (62922926).

It can be divided in two parts, 504 and 20521, that added together give a square (21025 = 145²).

The spelling of 50420521 in words is "fifty million, four hundred twenty thousand, five hundred twenty-one".