52103721 has 4 divisors (see below), whose sum is σ = 69471632. Its totient is φ = 34735812.

The previous prime is 52103687. The next prime is 52103729. The reversal of 52103721 is 12730125.

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 52103721 - 2⁹ = 52103209 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 (52103729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8683951 + ... + 8683956.

It is an arithmetic number, because the mean of its divisors is an integer number (17367908).

Almost surely, 2^52103721 is an apocalyptic number.

It is an amenable number.

52103721 is a deficient number, since it is larger than the sum of its proper divisors (17367911).

52103721 is a wasteful number, since it uses less digits than its factorization.

52103721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17367910.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 52103721 is about 7218.2907256497. The cubic root of 52103721 is about 373.4991173957.

Adding to 52103721 its reverse (12730125), we get a palindrome (64833846).

The spelling of 52103721 in words is "fifty-two million, one hundred three thousand, seven hundred twenty-one".