52545521 has 16 divisors (see below), whose sum is σ = 64183680. Its totient is φ = 41990400.

The previous prime is 52545509. The next prime is 52545523. The reversal of 52545521 is 12554525.

It is a cyclic number.

It is not a de Polignac number, because 52545521 - 2¹⁰ = 52544497 is a prime.

It is a super-2 number, since 2×52545521² = 5522063554322882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52545523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10946 + ... + 14996.

It is an arithmetic number, because the mean of its divisors is an integer number (4011480).

Almost surely, 2^52545521 is an apocalyptic number.

It is an amenable number.

52545521 is a deficient number, since it is larger than the sum of its proper divisors (11638159).

52545521 is a wasteful number, since it uses less digits than its factorization.

52545521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4184.

The product of its digits is 10000, while the sum is 29.

The square root of 52545521 is about 7248.8289399047. The cubic root of 52545521 is about 374.5518106242.

The spelling of 52545521 in words is "fifty-two million, five hundred forty-five thousand, five hundred twenty-one".