52577821 has 4 divisors (see below), whose sum is σ = 55670652. Its totient is φ = 49484992.

The previous prime is 52577813. The next prime is 52577827. The reversal of 52577821 is 12877525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46049796 + 6528025 = 6786^2 + 2555^2 .

It is a cyclic number.

It is not a de Polignac number, because 52577821 - 2³ = 52577813 is a prime.

It is a super-2 number, since 2×52577821² = 5528854522216082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52577827) 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, 1546390 + ... + 1546423.

It is an arithmetic number, because the mean of its divisors is an integer number (13917663).

Almost surely, 2^52577821 is an apocalyptic number.

It is an amenable number.

52577821 is a deficient number, since it is larger than the sum of its proper divisors (3092831).

52577821 is a wasteful number, since it uses less digits than its factorization.

52577821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3092830.

The product of its digits is 39200, while the sum is 37.

The square root of 52577821 is about 7251.0565437045. The cubic root of 52577821 is about 374.6285412075.

The spelling of 52577821 in words is "fifty-two million, five hundred seventy-seven thousand, eight hundred twenty-one".