52351921 has 4 divisors (see below), whose sum is σ = 53089344. Its totient is φ = 51614500.

The previous prime is 52351909. The next prime is 52352017. The reversal of 52351921 is 12915325.

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 52351921 - 2⁵ = 52351889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52351921.

It is not an unprimeable number, because it can be changed into a prime (52351021) 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, 368605 + ... + 368746.

It is an arithmetic number, because the mean of its divisors is an integer number (13272336).

Almost surely, 2^52351921 is an apocalyptic number.

It is an amenable number.

52351921 is a deficient number, since it is larger than the sum of its proper divisors (737423).

52351921 is an equidigital number, since it uses as much as digits as its factorization.

52351921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737422.

The product of its digits is 2700, while the sum is 28.

The square root of 52351921 is about 7235.4627357205. The cubic root of 52351921 is about 374.0912419059.

The spelling of 52351921 in words is "fifty-two million, three hundred fifty-one thousand, nine hundred twenty-one".