50555921 has 4 divisors (see below), whose sum is σ = 54444852. Its totient is φ = 46666992.

The previous prime is 50555899. The next prime is 50555927. The reversal of 50555921 is 12955505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3097600 + 47458321 = 1760^2 + 6889^2 .

It is a cyclic number.

It is not a de Polignac number, because 50555921 - 2¹⁸ = 50293777 is a prime.

It is a super-2 number, since 2×50555921² = 5111802296316482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50555927) 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, 1944446 + ... + 1944471.

It is an arithmetic number, because the mean of its divisors is an integer number (13611213).

Almost surely, 2^50555921 is an apocalyptic number.

It is an amenable number.

50555921 is a deficient number, since it is larger than the sum of its proper divisors (3888931).

50555921 is a wasteful number, since it uses less digits than its factorization.

50555921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888930.

The product of its (nonzero) digits is 11250, while the sum is 32.

The square root of 50555921 is about 7110.2687009704. The cubic root of 50555921 is about 369.7634743486.

The spelling of 50555921 in words is "fifty million, five hundred fifty-five thousand, nine hundred twenty-one".