50491021 has 6 divisors (see below), whose sum is σ = 58734510. Its totient is φ = 43277976.

The previous prime is 50491013. The next prime is 50491027. The reversal of 50491021 is 12019405.

It can be written as a sum of positive squares in only one way, i.e., 37088100 + 13402921 = 6090^2 + 3661^2 .

It is not a de Polignac number, because 50491021 - 2³ = 50491013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50490983 and 50491001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50491027) 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, 515166 + ... + 515263.

It is an arithmetic number, because the mean of its divisors is an integer number (9789085).

Almost surely, 2^50491021 is an apocalyptic number.

It is an amenable number.

50491021 is a deficient number, since it is larger than the sum of its proper divisors (8243489).

50491021 is a wasteful number, since it uses less digits than its factorization.

50491021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030443 (or 1030436 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 50491021 is about 7105.7034134560. The cubic root of 50491021 is about 369.6051814777.

The spelling of 50491021 in words is "fifty million, four hundred ninety-one thousand, twenty-one".