56552081 has 4 divisors (see below), whose sum is σ = 59878692. Its totient is φ = 53225472.

The previous prime is 56552077. The next prime is 56552107. The reversal of 56552081 is 18025565.

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 43771456 + 12780625 = 6616^2 + 3575^2 .

It is a cyclic number.

It is not a de Polignac number, because 56552081 - 2² = 56552077 is a prime.

It is a super-2 number, since 2×56552081² = 6396275730861122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56552381) 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, 1663280 + ... + 1663313.

It is an arithmetic number, because the mean of its divisors is an integer number (14969673).

Almost surely, 2^56552081 is an apocalyptic number.

It is an amenable number.

56552081 is a deficient number, since it is larger than the sum of its proper divisors (3326611).

56552081 is a wasteful number, since it uses less digits than its factorization.

56552081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326610.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 56552081 is about 7520.1117677864. Note that the first 3 decimals coincide. The cubic root of 56552081 is about 383.8393809776.

The spelling of 56552081 in words is "fifty-six million, five hundred fifty-two thousand, eighty-one".