52550921 has 4 divisors (see below), whose sum is σ = 54246144. Its totient is φ = 50855700.

The previous prime is 52550917. The next prime is 52550923. The reversal of 52550921 is 12905525.

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 52550921 - 2² = 52550917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52550923) 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, 847565 + ... + 847626.

It is an arithmetic number, because the mean of its divisors is an integer number (13561536).

Almost surely, 2^52550921 is an apocalyptic number.

It is an amenable number.

52550921 is a deficient number, since it is larger than the sum of its proper divisors (1695223).

52550921 is a wasteful number, since it uses less digits than its factorization.

52550921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695222.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 52550921 is about 7249.2014042928. The cubic root of 52550921 is about 374.5646408361.

The spelling of 52550921 in words is "fifty-two million, five hundred fifty thousand, nine hundred twenty-one".