50556621 has 4 divisors (see below), whose sum is σ = 67408832. Its totient is φ = 33704412.

The previous prime is 50556619. The next prime is 50556637. The reversal of 50556621 is 12665505.

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 not a de Polignac number, because 50556621 - 2¹ = 50556619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50556601) 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, 8426101 + ... + 8426106.

It is an arithmetic number, because the mean of its divisors is an integer number (16852208).

Almost surely, 2^50556621 is an apocalyptic number.

It is an amenable number.

50556621 is a deficient number, since it is larger than the sum of its proper divisors (16852211).

50556621 is a wasteful number, since it uses less digits than its factorization.

50556621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16852210.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 50556621 is about 7110.3179253814. The cubic root of 50556621 is about 369.7651809290.

The spelling of 50556621 in words is "fifty million, five hundred fifty-six thousand, six hundred twenty-one".