56528069 has 4 divisors (see below), whose sum is σ = 60876396. Its totient is φ = 52179744.

The previous prime is 56528057. The next prime is 56528071. The reversal of 56528069 is 96082565.

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 2211169 + 54316900 = 1487^2 + 7370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56528069 is a prime.

It is a super-2 number, since 2×56528069² = 6390845169737522, 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 (56528039) 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, 2174144 + ... + 2174169.

It is an arithmetic number, because the mean of its divisors is an integer number (15219099).

Almost surely, 2^56528069 is an apocalyptic number.

It is an amenable number.

56528069 is a deficient number, since it is larger than the sum of its proper divisors (4348327).

56528069 is a wasteful number, since it uses less digits than its factorization.

56528069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348326.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 56528069 is about 7518.5150794555. The cubic root of 56528069 is about 383.7850472506.

The spelling of 56528069 in words is "fifty-six million, five hundred twenty-eight thousand, sixty-nine".