52555521 has 8 divisors (see below), whose sum is σ = 70626304. Its totient is φ = 34760880.

The previous prime is 52555519. The next prime is 52555543. The reversal of 52555521 is 12555525.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52555521 - 2¹ = 52555519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52555021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68590 + ... + 69351.

It is an arithmetic number, because the mean of its divisors is an integer number (8828288).

Almost surely, 2^52555521 is an apocalyptic number.

It is an amenable number.

52555521 is a deficient number, since it is larger than the sum of its proper divisors (18070783).

52555521 is a wasteful number, since it uses less digits than its factorization.

52555521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138071.

The product of its digits is 12500, while the sum is 30.

The square root of 52555521 is about 7249.5186736776. The cubic root of 52555521 is about 374.5755695825.

The spelling of 52555521 in words is "fifty-two million, five hundred fifty-five thousand, five hundred twenty-one".