50401521 has 10 divisors (see below), whose sum is σ = 75291282. Its totient is φ = 33600960.

The previous prime is 50401513. The next prime is 50401523. The reversal of 50401521 is 12510405.

It can be written as a sum of positive squares in only one way, i.e., 42107121 + 8294400 = 6489^2 + 2880^2 .

It is not a de Polignac number, because 50401521 - 2³ = 50401513 is a prime.

It is a super-2 number, since 2×50401521² = 5080626638226882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 50401494 and 50401503.

It is not an unprimeable number, because it can be changed into a prime (50401523) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 311040 + ... + 311201.

Almost surely, 2^50401521 is an apocalyptic number.

It is an amenable number.

50401521 is a deficient number, since it is larger than the sum of its proper divisors (24889761).

50401521 is an equidigital number, since it uses as much as digits as its factorization.

50401521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622253 (or 622244 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 50401521 is about 7099.4028622131. The cubic root of 50401521 is about 369.3866658688.

Adding to 50401521 its reverse (12510405), we get a palindrome (62911926).

It can be divided in two parts, 5040 and 1521, that added together give a 8-th power (6561 = 3⁸).

The spelling of 50401521 in words is "fifty million, four hundred one thousand, five hundred twenty-one".