52063721 has 4 divisors (see below), whose sum is σ = 52205952. Its totient is φ = 51921492.

The previous prime is 52063717. The next prime is 52063747. The reversal of 52063721 is 12736025.

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 52063721 - 2² = 52063717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52060721) 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, 70565 + ... + 71298.

It is an arithmetic number, because the mean of its divisors is an integer number (13051488).

Almost surely, 2^52063721 is an apocalyptic number.

It is an amenable number.

52063721 is a deficient number, since it is larger than the sum of its proper divisors (142231).

52063721 is a wasteful number, since it uses less digits than its factorization.

52063721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142230.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 52063721 is about 7215.5194546200. The cubic root of 52063721 is about 373.4035145662.

Adding to 52063721 its reverse (12736025), we get a palindrome (64799746).

The spelling of 52063721 in words is "fifty-two million, sixty-three thousand, seven hundred twenty-one".