50621106521 has 4 divisors (see below), whose sum is σ = 50807900544. Its totient is φ = 50434312500.

The previous prime is 50621106517. The next prime is 50621106539. The reversal of 50621106521 is 12560112605.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50621106521 - 2² = 50621106517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50621106581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93396605 + ... + 93397146.

It is an arithmetic number, because the mean of its divisors is an integer number (12701975136).

Almost surely, 2^50621106521 is an apocalyptic number.

It is an amenable number.

50621106521 is a deficient number, since it is larger than the sum of its proper divisors (186794023).

50621106521 is a wasteful number, since it uses less digits than its factorization.

50621106521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186794022.

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 50621106521 in words is "fifty billion, six hundred twenty-one million, one hundred six thousand, five hundred twenty-one".