52011521 has 4 divisors (see below), whose sum is σ = 53689344. Its totient is φ = 50333700.

The previous prime is 52011503. The next prime is 52011539. The reversal of 52011521 is 12511025.

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 an interprime number because it is at equal distance from previous prime (52011503) and next prime (52011539).

It is a cyclic number.

It is not a de Polignac number, because 52011521 - 2⁶ = 52011457 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 52011521.

It is not an unprimeable number, because it can be changed into a prime (52011541) 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, 838865 + ... + 838926.

It is an arithmetic number, because the mean of its divisors is an integer number (13422336).

Almost surely, 2^52011521 is an apocalyptic number.

It is an amenable number.

52011521 is a deficient number, since it is larger than the sum of its proper divisors (1677823).

52011521 is a wasteful number, since it uses less digits than its factorization.

52011521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677822.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 52011521 is about 7211.9013443058. The cubic root of 52011521 is about 373.2786791981.

Adding to 52011521 its reverse (12511025), we get a palindrome (64522546).

The spelling of 52011521 in words is "fifty-two million, eleven thousand, five hundred twenty-one".